bluuebunny/crossref_metadata_2025_split huggingface dataset:
Merubah Tantangan Sebagai Peluang Di Masa Pandemi Bagi Komunitas Umkm Naik Kelas Kota Bekasi
Authors: Nurhidayati Nurhidayati , Sugiyah Sugiyah , Syahyuni Dedy , Wianti Wiwin 
Published: November 2022

Pembatasan pergerakan manusia dalam kehidupan sehari-hari sebagai akibat dari adanya pandemic covid 19 yang berlangsung hampir satu tahun berdampak pada semua sendi kehidupan. Tuntutan untuk melakukan adaptasi dengan kondisi baru ini menjadi keharusan, baik dalam kesehariannya atau diluar kegiatan keseharian seperti berekonomi, dan sebagainya. UMKM sebagai pelaku ekonomi sangat merasakan imbas dari kondisi pandemi ini. Daya beli masyarakat menjadi berkurang sebagai akibat semakin berkurangnya pendapatan dan bahkan ada yang mengalami pemutusan hubungan kerja (PHK). Oleh karena itu para pelaku usaha mikro, kecil, menengah atau UMKM harus dapat melihat dan menyikapi perubahan ini, melalui adaptasi, digitalitasi, kolaborasi dan yang penting lagi adalah ketangguhan mentalitas pelaku UMKM. Pelaksanaan pengabdian masyarakat ini menggunakan metode deskriptif dan bertujuan untuk membuka wawasan para pelaku UMKM melalui webinar dengan tema merubah tantangan sebagai peluang di masa pandemi bagi komunitas UMKM naik kelas kota Bekasi. Harapannya pelaku UMKM terus berkreasi dan berinovasi atas usahanya menyesuaikan keadaan pandemi ini, agar kegiataan perekonomian masyakat tetap berkesinambungan.
Pemanfaatan Instagram Sebagai Media Pemasaran
Authors: Rachmawati Susan , Pramularso Eigis Yani , Sari Imelda 
Published: November 2022

Salah satu ujung tombak dalam operasional usaha adalah bidang pemasaran. Pemasaran menjadi kunci dimana produk yang dihasilkan oleh perusahaan. dapat diterima atau tidak. Peran yang penting ini menjadi tantangan manajemen agar dapat mengelola bidang pemasaran ini dengan lebih optimal. Salah satu pengelolaan yang dapat dilakukan adalah memanfaatkan dan menyesuaikan pemasaran dengan teknologi digital yang sangat berkembang saat ini. Berkaitan dengan pemasaran di era digital untuk para pelaku usaha Siwindu Maju Kabeh masih mempunyai permasalahan dalam upaya mengerti dan memilih lebih jauh media digital yang cocok untuk digunakan dalam kegiatan pemasarannya. Permasalahan yang ada pada Siwindu Maju Kabeh ini antara lain pengetahuan yang kurang detil terhadap pemahaman media pemasaran online serta pengetahuan yang masih kurang terkait pemilihan aplikasi dan penggunaan aplikasi media sosial dalam pemasaran produk. Solusi yang dilakukan dengan memberikan pelatihan tentang pemahaman media sosial yang tepat dari berbagai pilihan yang ada sebagai salah satu sarana yang nantinya dapat digunakan bagi pelaku usaha di Siwindu Maju Kabeh dalam memasarkan produk. Metode yang digunakan dalam kegiatan ini yaitu observasi, pelaksanaan kegiatan PkM dan evaluasi serta monitoring. Dalam kegiatan PKM ini antusias peserta sangat besar untuk mengetahui, memahami dan mempaktekkan penggunaan instagram sebagai sarana pemasaran secara online. Hasil dari kegiatan ini yaitu meningkatnya pengetahuan peserta PkM mengenai instagram yang dapat digunakan sebagai media pemasaran.
Pelatihan Aplikasi Video Conference Google Hangouts Meet Pada Pengurus Dewan Kemakmuran Masjid (DKM) Darul Hikmah
Authors: Rahmawati Mari , Nurachim Rusma Insan , Supeno Wangsit , Lestari Ade Fitria 
Published: November 2022

Pelaksanaan Pengabdian Masyarakat ini, kami tertarik untuk memberikan pelatihan dengan tema, “Pelatihan Aplikasi Video Conference Google Hangouts Meet Pada Pengurus Dewan Kemakmuran Masjid (DKM) Darul Hikmah” secara daring melalui platform Zoom Cloud Meeting. Adapun tujuan dari pelatihan ini adalah agar pengurus DKM Darul Hikmah belajar beragam aplikasi meeting online dan video conference jarak jauh, kini hadir untuk memudahkan dalam menggelar rapat daring (online) dari rumah. Di era teknologi yang semakin canggih diperlukan media online yang dapat mempermudah aktivitas pertemuan dan acara-acara penting berkaitan dengan kegiatan masjid. Dalam hal ini pengurus Dewan Kemakmuran Masjid (DKM) dapat memanfaatkan aplikasi media online yang jumlahnya cukup banyak, di antaranya adalah Google Hangouts Meet. Berkaitan penggunaan aplikasi Google Hangouts Meet, maka pengurus DKM perlu untuk memahami fungsi dan cara penggunaannya, sehingga dalam pelaksanaan kegiatan dapat berjalan dengan lancar.
High Feed Rate Plasma Spraying of YSZ from Various Suspensions
Authors: Musalek R. , Medricky J. , Kotlan J. , Tesar T. , Lukac F. , Ctibor P. , Illkova K. , Chraska T. 
Published: November 2022

Abstract
In this paper, yttria-stabilized zirconia (YSZ) coatings were prepared by plasma spraying of ready-to-spray suspensions provided by three different manufacturers. High-enthalpy hybrid water-argon plasma torch WSPH 500 was successfully used for deposition of coatings with porous and columnar microstructure consisting of tetragonal non-transformable phase. Sensitivity of the deposition process to variation of deposition conditions was also evaluated by the change of suspension injection point position. Slight differences in the microstructures of the deposited coatings (in particular character of porosity and mutual bonding of the microsplats) were reflected in slight but measurable differences in hardness and wear resistance of the coatings indicating changes in the coating cohesion. Tensile adhesion/cohesion strength of the coatings was found to be in the range of 9 to 15 MPa. High coating porosity desirable for low thermal conductivity combined with high suspension feed rate (from about 100 to 120 ml/min in this study) makes the WSP-H coatings promising for further development for example in thermal barrier coatings applications.
Transpiring Thermally Sprayed Alumina Layers with Integrated Fluid Flow Tubes
Authors: Rodriguez Diaz M. , Möhwald K. , Loftfield N. , Kästner M. , Reithmeier E. , Knigge S. , Glasmacher B. , Maier H. J. 
Published: November 2022

Abstract
Osteoarthritis in the hip or knee is one of the most common diseases in industrialized countries. The implantation of an endoprosthesis as a joint replacement represents the most effective way to treat serious pathological changes in these joints. The lifetime of an endoprosthesis can be shortened by aseptic inflammation and osteolysis. The main cause for the aseptic inflammations, osteolysis, and thus, the failure of the endoprostheses are abrasion particles of the acetabular cup inlays that are caused by the tribological load of the prosthesis. This research project aims at developing coatings with enhanced tribological behaviour for endoprostheses by an active hydrodynamic lubrication of the joint with synovial fluid. In addition, biocompatibility, as well as the increase of the strength under static and cyclic loading need be realized. In the current approach, a deterministic fluid flow tube structure is formed in a thermally sprayed alumina layer by the introduction of a leachable placeholder. This tube structure allows the transverse transport of the synovial fluid through the alumina layer. Furthermore the synovial fluid can be transported into the lubricating gap of the sliding surfaces by leaving the alumina layer through the porous surface. First results will be presented and the ramifications in correlation to applications will be discussed.
Cavitation Erosion Characteristics of HVOF Thermal Sprayed WC-Cermet Coatings
Authors: Kanno A. , Takagi K. , Arai M. 
Published: November 2022

Abstract
Cavitation erosion (CE) damage, which occurs in the main parts (made of high chromium cast steel) of hydroelectric power generation machine, is one of the serious problems. It is expected that life time of those parts would be prolonged if the suitable CE-resistant coating is applied on the surface of the cast steel. In this study, WC-cermet coatings (WC-CoCr and WC-Cr3C2-Ni), which were fabricated by high-velocity oxygen-fuel (HVOF) thermal spraying process, was interested in protecting CE attack to the cast steel. To clarify CE property of the WC-cermet coatings, the ultrasonic vibration tests were conducted, and the amount of volume loss characterized as CE damage was measured. The microstructure and the fracture toughness, which was evaluated by the indentation test method, of the coatings were related with the CE damage. As the results obtained in this study, the fragment which was spalled from the surface after CE test was almost flake-like shape, and its size was from 2µm to 50µm. SEM observation indicated that this fragment included both WC particle and metal binder, which means that WC particle and metal binder was still strongly bonded together. It was also confirmed that the amount of volume loss could relate directly with the fracture toughness KIC rather than Vickers hardness. It was considered that CE damage was progressed into the depth by throwing out the fragment originated from micro crack initiation. Thus, it was required that the CE resistance of the developed coatings could be labelled through the fracture toughness.
SPS Coating Microstructure Controlled by the Surface Topography Using Laser Texturing
Authors: Kromer R. , Sokołowski P. , Candidato R. T. , Costil S. , Pawłowski L. 
Published: November 2022

Abstract
Thermal barrier coatings (TBC‘s) being produced at present either by atmospheric plasma spraying (APS) or electron beam physical vapor deposition (EB PVD) are widely used in the hot-temperature sections of turbines to provide thermal and corrosion protections. An emerging technology of suspension plasma spraying has become interesting for the manufacturing of thermal barrier coatings thanks to the useful microstructure including columns similarly to the EB-PVD deposits associated with considerably lower price of production. A narrow window of optimal suspension plasma spraying (SPS) parameters remain an outstanding problem in creating the favorable microstructure. The recent studies demonstrated that the substrate roughness may play an important role in reaching columnar growth of the coatings. This study presents a follow up by showing how the substrate topography obtained by laser surface texturing may be controlled to create regular columnar structure thanks to. The laser generated peaks disposed regularly on the surface can promote columnar structure growth. The formulated suspensions were sprayed onto superalloy substrates coated with powder plasma sprayed bond coats. Optimized previously, plasma spray parameters were selected to generate columnar structures and to find out the influence of the suspension behavior on coating microstructures. The results indicate that columnar SPS coating microstructure can be controlled by optimizing the laser treatment parameters. The control of surface topography may be an important factor to improve the performances of TBC-SPS coatings.
Influence of Feedstock Powder Modification by Heat Treatments on the Properties of APS-Sprayed Al2O3-40%TiO2 Coatings
Authors: Berger L.-M. , Vaßen R. , Sohn Y.J. 
Published: November 2022

Abstract
Aluminum titanate (Al2TiO5) is a congruently melting compound in the binary Al2O3-TiO2 system, which decomposes below 1200 °C. Its properties (e.g. thermal conductivity, CTE) differ significantly from those of Al2O3 and TiO2. Thus it is of special interest to study the stability of Al2TiO5 in the spray process and its influence on the coating properties. A commercial fused and crushed Al2O3-40%TiO2 powder, which was found to be substoichiometric, was selected as the feedstock material for the experimental work, as the composition is close to stoichiometric Al2TiO5. Part of that powder was heat-treated in air at 1150° and 1500°C in order to vary the phase composition, while not influencing the particle size distribution and processability. The powders were analyzed by thermal analysis, XRD and FESEM including metallographically prepared cross sections. A powder having Al2TiO5 as the main phase was not possible to be prepared due to inhomogeneous distribution of Al and Ti in the original powder. Plasma spraying was performed with a TriplexPro-210 (Oerlikon Metco) using Ar-H2 and Ar-He plasma gas mixtures with 41 and 48 kW plasma power. Coatings were studied by XRD, SEM of metallographically prepared cross sections, and microhardness HV1. Moreover, the results show a clear influence of the Al2TiO5 content in the feedstock powder on the phase composition of the coatings.
Dry-Sliding Wear of Laser Clad Nickel Aluminide / Chromium Carbide Coatings Against Cast Iron
Authors: Bengtsson S. , Dizdar S. , Gong K. 
Published: November 2022

Abstract
The wear of piston rings in large marine two-stroke diesel engines is a major maintenance cost. Applying coatings with good oxidation, corrosion resistance and high temperature strength, can lower the total maintenance cost. In the past nickel aluminide with chromium carbide have been applied to pistons by thermal spraying. Using laser cladding a suitable microstructure can be formed while at the same time avoiding cracks and bonding issues. In this report powders and coatings were manufactured in order to be able to investigate the dry-sliding wear behavior. Material with three levels of carbides was atomized. Wear test samples were manufactured by laser cladding. The dry sliding wear-mechanism maps are generated by using block on ring test setup where coated blocks slide against cast iron rings. All alloys exhibited regions of plasticity-dominated wear and oxidational wear with a transition region in-between. The carbide-containing alloys showed lower friction and wear in comparison to the carbide free nickel aluminide alloy.
Lamellar Bonding Enhanced NiCr-Mo Coating with Comparable Erosion Resistance to Similar Bulk by Plasma-Spraying Shell-Core-Structured Powders
Authors: Tian J. , Wang Y. , Li C. , Yang G. , Li C. 
Published: November 2022

Abstract
NiCr-Mo composite coating was prepared by plasma spraying of shell-core-structured NiCr-Mo powders. The morphologies of the NiCr-Mo powders and microstructure of the corresponding NiCr-Mo coating were characterized by SEM. Furthermore, the erosion behavior of the NiCr-Mo coating at impact angles of both 30° and 90° was investigated, and was further compared with that of the Ni20Cr coating and the In-738 alloy bulk. Results showed that fully-dense and homogenous NiCr-Mo coating with excellent interface bonding and no pure Mo inclusions was obtained. Furthermore, the erosion test results showed that the erosion rate of the optimized NiCr-Mo coating is lower than that of NiCr coating at both impact angles. Moreover, the NiCr-Mo coating presented excellent erosion resistance which was comparable as that of In-738 alloy bulk, attributing to the fully-dense microstructure and metallurgical interface bonding within coating.
Thermal Spraying of Thin Metallic Coatings
Authors: Trenkle F. , Koehler R. , Winkelmann M. , Wuest F. , Luth J. , Hartmann S. 
Published: November 2022

Abstract
Metallic coatings can be produced easily with thermal spray and cold gas spray processes. However, when coating thicknesses below 50 μm are required for economical or technological reasons, the use of these well-established processes becomes more challenging. The company OBZ Innovation GmbH has developed spray processes that can produce metallic coatings with thicknesses of less than 20 μm. Such coatings are of interest for applications such as cold gas sprayed silver coatings with high purity and good electrical conductivity. Thinner sprayed coatings of such valuable materials have economic advantages, and the process may be competitive with commonly used thin film coating methods.
Nozzle-Internal Particle Velocity Measurements and Loading Effect on Particle Acceleration Inside a Cold Spray Nozzle
Authors: Meyer M. , Caruso F. , Lupoi R. 
Published: November 2022

Abstract
The advantages of the solid state deposition process Cold Spray (CS) over conventional spray technologies go hand in hand with the requirement of high and well-predictable particle velocities. The acceleration of particles primarily takes place within the CS-nozzle while measurements of their velocity are conducted downstream of its exit. Despite their essential value, these observations are limited, in that only the result of the acceleration can be evaluated, not the actual driving mechanisms themselves. Previous work has indicated that there is no conclusive understanding of these mechanisms, especially in cases of increasing particle loading. This study therefore presents a transparent rectangular CS-nozzle design (made out of quartz) for a low stagnation pressure regime. A novelty to the field of thermal spray is the first report of particle in-flight measurements within the CS-nozzle using Particle Tracking Velocimetry (PTV) at varying particle loadings and pressure levels. It is found that particle velocities in the jet decrease with increasing particulate loading as the momentum exchange of the gas is enhanced, while in the subsonic flow region, the average velocity level increases due to particle-particle interactions with shallower axial velocity profiles. This effect is aggravated for higher working pressures, as energetic collisions cause increasing losses, depending on the number density of particles. This study forms the basis for a comprehensive nozzle-internal analysis.
Thermal Conductivity and Interfacial Thermal Resistance of Thermal Barrier Coatings
Authors: Takahashi S. , Akoshima M. , Kanno A. , Suidzu T. 
Published: November 2022

Abstract
A method measuring the thermal conductivity and the interfacial thermal resistance of thermal barrier coatings (TBCs) which consist of metallic bond-coats (BCs) and ceramics top-coats (TCs) on superalloys was newly developed. It was based on the areal heat diffusion time method analysing the heat diffusion across multilayers. The developed method was experimentally verified using the BC and the TBC specimens coated by APS. It was found that there were the interfacial thermal resistance not only between the TC and the BC but also between the BC and the substrate. Furthermore, the thermal conductivities of the BC and the TC obtained from the BC and the TBC specimens by this method considering the interfacial thermal resistance were in good agreement with those measured from the free-standing specimen of each coating. Thus, it was confirmed that the newly developed method is effective to evaluate the thermal conductivity and the interfacial thermal resistance of the TBC.
Study of the Interface Strength and Residual Stresses Within Plasma Sprayed Alumina Coatings Involving LASAT (Laser Shock Adhesion Test)
Authors: Sapardanis H. , Guipont V. , Borit F. , Debray A. , Koster A. , Maurel V. 
Published: November 2022

Abstract
The study of both the interface strength and residual stresses within a plasma sprayed ceramic coating is of great interest which main purpose is a better understanding of the mechanical properties of metal/ceramic systems. In this work, experiments involving a LASAT facility (LASAT: Laser Shock adhesion test) were implemented in order to analyse the adhesion and the damaging behaviour (debonding and buckling) of alumina coatings onto Co-based alloy. Similar alumina coatings were deposited using same plasma parameters with various surface preparations: smooth or severe grit blasting, with and without pre-oxidation. The non-destructive analyses (Optical and IR imaging) of the buckled region after LASAT have allowed to compare and discuss the interface strength of the studied coated samples. Further discussion was carried out by analysing the blister, resulting from the release of residual stresses within the coating after LASAT. It was thus evidenced that the residual stress state is a key parameter on resulting adhesive properties. This explorating work suggests using the LASAT method to analyse the adhesion and residual stresses within thermal sprayings.
Multilayered Suspension Plasma Sprayed Thermal Barrier Coatings for High Temperature Gas Turbine Applications
Authors: Gupta M. , Markocsan N. , Rocchio-Heller R. , Liu J. , Li X. , Östergren L. 
Published: November 2022

Abstract
Improvement in the performance of thermal barrier coating systems (TBCs) is one of the key objectives for further development of gas turbine applications. The material most commonly used as TBC topcoat is yttria stabilised zirconia (YSZ). However, the usage of YSZ is limited by the operating temperature range which in turn restricts the engine efficiency. Materials such as pyrochlores, perovskites, rare earth garnets, etc. are suitable candidates which could replace YSZ as they exhibit lower thermal conductivity and higher phase stability at elevated temperatures. The objective of this work was to investigate different multi-layered TBCs consisting of advanced topcoat materials fabricated by Suspension Plasma Spraying (SPS). The investigated topcoat materials were YSZ, dysprosia stabilised zirconia, gadolinium zirconiate, cerium doped YSZ and yttria fully stabilised zirconia. All topcoats were deposited with TriplexPro-210 plasma spray gun and radial injection of suspension. Lifetime of these samples was examined by thermal cyclic fatigue and thermal shock testing. Microstructure analysis of as-sprayed and failed specimens was performed with scanning electron microscope. The failure mechanisms in each case have been discussed in this article. The results show that SPS could be a promising route to produce multilayered TBCs for high temperature applications.
Influence of the Surface Structure on the Adhesion Strength of ZnAl2 Coatings on Thermally Instable Polymers Printed by Means of Fused Layer Modelling (FLM)
Authors: Tillmann W. , Schaak C. , Bleicher K. 
Published: November 2022

Abstract
Additive manufacturing (AM) techniques give access to completely new manufacturing processes. AM techniques using metals, ceramics, or plastics feedstock are predestined for lightweight construction and for components with complex shapes or internal functions. AM processing with plastics stands out due to the low density of polymers, a good process capability, and low initial costs. The properties of polymer components are extremely dependent on the utilized plastics and the reinforcements, e.g. in the form of fibres. Furthermore, coatings can improve the properties and enhance the possible range of applications for plastics. In the present study, PLA (polylactic acid) was printed utilizing Fused Layer Modeling (FLM). The surfaces of the PLA samples were directly structured with pits with different widths during printing. Subsequently, the surfaces were coated with ZnAl2 by means of Twin Wire Arc Spraying (TWAS). Adhesion tests meeting DIN EN 582 were conducted to measure the adhesion of the coating on the structured plastic surface. The results were compared to the adhesion of ZnAl2 coatings on grit blasted and as-built surfaces. Overall, the surface adhesion was significantly better for the samples with directly structured surfaces. Hence, a direct structuring of the surface during a 3D building process promises to be an outstanding possibility to prepare surfaces prior to coating processes.
Tribological Performance of NiCrAlYSi-BaF2/CaF2-Polyester Coating Deposited by Air Plasma Spray
Authors: Li Q. , Li S. 
Published: November 2022

Abstract
NiCrAlYSi-BaF2/CaF2-Polyester material was developed for abradable seal of high-pressure compressor in gas turbine. The NiCrAlYSi-BaF2/CaF2-Polyester coatings were deposited on Ni-based superalloy substrates with an air plasma spray system. Friction and wear properties of the coatings were investigated in view of friction coefficient and wear morphologies of the coatings. The morphologies of the coatings were evaluated by field emission scanning electron microscopy. The results showed that NiCrAlYSi-7%BaF2/CaF2-10%Polyester coating exhibits lower macrohardness, lower friction coefficient and excellent abradability.