bluuebunny/crossref_metadata_2025_split huggingface dataset:
Corrosion Performance of Damaged Thermally Sprayed Aluminum in Simulated Deep Sea Environment
Authors: Paul S. 
Published: April 2023

Abstract
Thermally sprayed aluminum (TSA) has been used in offshore applications for decades, protecting steel structures from seawater corrosion. However, very little work is reported on the performance of TSA when damaged, particularly in deep sea applications. This paper presents the results of a study in which an arc-sprayed aluminum-coated steel sample was subjected to synthetic seawater at 5 °C for 30 days in an autoclave at 50 MPa to simulate 5000 m of water pressure. Discontinuities or “holidays” amounting to 3% of the sample area were drilled into the coatings, exposing the underlying steel to direct attack by the synthetic seawater. After testing, SEM and EDX analysis revealed the formation of a protective Mg-based layer on the exposed steel with negligeable calcium content and no visible corrosion products. The results indicate that TSA coatings can protect steel in deep sea environments even when damaged.
Introduction of Micro Resin Fragments with Ceramic Nanoparticles into Plasma Flame to Create Fine Coated Layers
Authors: Katsuki M. , Harada H. , Kirihara S. 
Published: April 2023

Abstract
This paper introduces a new way to inject nanoparticles into a plasma flame and demonstrates its use in the deposition of dense ceramic coatings. Instead of suspensions or pastes, nanoparticles are dispersed in micro resin fragments. In this case, zirconia particles with an average diameter of 200 nm were mixed with a thermosetting acrylic liquid resin and the mixture was solidified, crushed, and screened. Micro resin fragments are fed into the plasma flame using a conventional powder feeder. The resin content mostly burns away in the plasma jet, which heats and propels the nanoparticles into the substrate. SEM analysis of the zirconia deposits shows that they are free of microcracks and pores, although carbon contamination was detected by thermogravimetry. Coating hardness tests were also conducted and the results are presented.
Preparation and Properties of Cr3C2-25NiCr Thermal Spraying Powders and Coatings with Nano-Sized, Micro-Sized, and Bimodal Structures
Authors: Xie H. , Wang S. , Liao X. , Liu C. , Liu F. 
Published: April 2023

Abstract
Nano-sized, micro-sized, and bimodal Cr3C2-25NiCr feedstock powders were prepared using a spray drying and agglomeration sintering process and deposited by HVOF spraying. The microstructure and phase composition of the three powders and corresponding coatings were assessed along with coating hardness, toughness, and abrasive wear resistance. All three powders were nearly spherical in shape, but the bimodal powder had the best sphericity, the most uniform composition distribution, and the highest deposition efficiency. All three coatings were primarily composed of Cr3C2 and NiCr phases, although a small amount of Cr2O3 was detected in the nano- and micro-coatings due to oxidation. Compared with the micro-coating, the nano-coating has higher toughness but lower microhardness and abrasive resistance. The bimodal coating, however, integrates the advantages of the other coatings, has low porosity and a dense microstructure, and is tightly adhered to the substrate, thus displaying the best comprehensive performance.
Performance of HVOF Sprayed Ni-20 Cr+1%Zr Coating in Na2SO4-60%V2O5 Environment at 900 °C
Authors: Kaushal G. , Singh H. , Prakash S. 
Published: April 2023

Abstract
In this study, HVOF sprayed NiCr alloy coatings on A213 TP347H boiler steel are evaluated by severe corrosion tests in a high-temperature molten salt environment. XRD and FE-SEM/EDS analysis results are presented and discussed and correlated with corrosion kinetics.
The Correlation of the TBC Lifetimes in Burner Cycling Test with Thermal Gradient and Furnace Isothermal Cycling Test by TGO Effects
Authors: Li C.-J. , Dong H. , Ding H. , Yang G.-J. 
Published: April 2023

Abstract
This study investigates the correlation between thermal barrier coating (TBC) lifetime and thermally grown oxide (TGO) layer thickness. YSZ TBCs were deposited by atmospheric plasma spraying on Ni-base substrates and subjected to burner cycling tests with a thermal gradient and isothermal furnace testing. Both tests revealed that thermal cycling lifetime decreases with increasing TGO thickness, following a power law function, and for a critical TGO thickness of 5-6 μm, the failure mode changes from cracking within the YSZ layer to interface cracking around the TGO. Although either test can be used to evaluate TBC performance, burner cycling tests are better suited for evaluating ceramic topcoats, while furnace cycling test results integrate the effects of bond coat properties, especially oxidation resistance, as well as ceramic topcoat cracking resistance. The two tests can thus be used together to assess the factors that control TBC failure.
High Temperature Protective Performance of LT-HVOF Sprayed TiAl3-Al Coating for Ti-6Al-4V Substrate
Authors: Deng C.-M. , Liu M. , Yang W. , Zhang J. , Mao J. , Deng C. , Zhou K. 
Published: April 2023

Abstract
TiAl3-Al composite coatings are believed to hold promise for extending the service temperature range of titanium alloys used as structural materials. In this study, 0.6 x 40 mm Ti-6Al-4V specimens are coated with a 30 μm thick layer of TiAl3-Al by low-temperature HVOF spraying. Cross-sectional imaging shows that the as-sprayed coatings have a dense laminar microstructure and are well bonded to the substrate. Following the initial examination, the coating samples were placed in a muffle furnace, where they were held at 700 °C for up to 1000 h. Mass gain was detected starting at 200 h and remained nearly constant for the remainder of the test. This is an indication of excellent corrosion resistance, which is verified by SEM cross-sectioning and elemental EDS analysis. A brief explanation of the protective mechanism of the coating is provided.
Characterization of WC-Co Coating Modified by Nano-Sized TiC Addition Using Electron Microscopy Methods
Authors: Myalska H. , Swadźba R. , Rozmus R. , Moskal G. , Wiedermann J. 
Published: April 2023

Abstract
In this study, WC-Co coatings with nano-sized TiC additions were deposited on steel substrates by high velocity air fuel (HVAF) spraying and their microstructure and phase composition was analyzed using different electron microscopy techniques. Tungsten-reinforced cobalt phases detected in the vicinity of WC grains were identified as Co0.9W0.1 by selected area diffraction. No titanium phases other than TiC were found, which suggests that nano-TiC may increase the stability of metallic matrix microstructure in WC-based coatings.
A Comparison between Nanostructured YSZ Coatings Fabricated by LPPS and APS Method Using Unsintered Porous Agglomerates
Authors: Zhao Y. , Gao Y. 
Published: April 2023

Abstract
Nanostructured YSZ coatings were deposited by plasma spraying at different pressures and plasma currents. Coatings sprayed at low pressures exhibited fine equiaxed grain structures with consolidated coarser grains and loose-packed nano granules. Especially at the low end of the current range, larger amounts of crystalline grain fell into the nanoscale, significantly reducing the average grain size in the coating. At the high end of the range, the coating exhibited a uniform fine equiaxed grain structure of around 200 nm. Mechanical properties, including average microhardness and elastic modulus, were also measured and compared. LPPS YZS coatings showed slightly higher microhardness, but half the elastic modulus of APS YSZ layers.
Comparison of ZrB2-MoSi2 Composite Coatings Fabricated by Atmospheric and Vacuum Plasma Spray Processes
Authors: Niu Y. , Wang Z. , Zheng X. , Ding C. 
Published: April 2023

Abstract
In this work, ZrB2-MoSi2 (ZM) composite coatings are fabricated using two plasma spraying techniques: VPS and APS. Phase composition and coating microstructure were assessed and microstructural changes at 1500 °C were investigated along with corresponding oxidation behaviors. The results show that the VPS composite coatings have lower oxide content, surface roughness, and porosity and much higher oxidation resistance than coatings produced by atmospheric plasma spraying. Possible reasons for the differences observed are presented.
Evaporation Enhancement of YSZ Spray Particles for PS-PVD by Modifying the Nozzle in Conventional 80 kW Plasma Spray System
Authors: Chen Q.-Y. , Li C.-J. , Li C.-X. , Yang G.-J. 
Published: April 2023

Abstract
One way to reduce plasma jet velocity and prolong the dwell time of spray particles in the jet is to enlarge the orifice of the torch nozzle. In this study, normal and modified nozzles are used to deposit YSZ particles on ceramic and superalloy substrates by plasma spray-physical vapor deposition (PS-PVD). The modified nozzle is shown to increase the evaporation of YSZ particles and thus the quantity of Zr atoms and Zr1+ ions in the plasma jet, which allows columnar structured coatings to be realized at higher deposition rates using a conventional 80 kW plasma spray system. The columnar ceramic coatings are also shown to have good conformity on cold-sprayed MCrAlY bond coats with high surface roughness.
Enhancement of Wear and Impact Resistance of Fe Based Amorphous Coatings by the Addition of Alumina Particles
Authors: Yasir M. , Zhang C. , Wang W. , Xu P. , Liu L. 
Published: April 2023

Abstract
This study assesses the influence of alumina particle additions on the impact and wear behavior of iron based amorphous coatings. Test results show that the presence of Al2O3 particles improved the impact and wear resistance of the coatings by a factor of three. Deformation and fracture mechanisms under impact loading were also investigated. It was revealed via SEM analysis and finite element simulations that hard second phase particles in the amorphous coating matrix disperse residual stresses generated during impact loading and that brittle particles absorb impact energy by fracturing, which plays a vital role in crack prevention and arresting. Abstract only; no full-text paper available.
Study of High Velocity Arc Sprayed Heat Resistant Coatings from FeCrAlBY Cored Wire
Authors: Korobov Y. , Nevezhin S. , Filippov M. , Makarov A. , Malygina I. , Fantozzi D. , Milanti A. , Koivuluoto H. , Vuoristo P. 
Published: April 2023

Abstract
This work evaluates the influence of yttrium on the heat and wear resistance of active arc sprayed (AAS) coatings produced using FeCrBAl cored wire. The AAS process differs from ordinary arc spraying in that it uses propane-air combustion products as a carrier gas instead of compressed air. This increases particle velocity and temperature and forms a reducing atmosphere that protects metal particles in flight and improves coating adhesion and porosity. Coating samples produced with different amounts of yttrium were characterized in terms of surface morphology, microstructure, phase composition, and hardness. They were also subjected to heat resistance, abrasive wear, and corrosion tests in which they performed better than typical wrought steels used in boilers.
Influence of Free Silicon Content on the Oxidation Resistance of SiC Coatings on C/SiC Composites
Authors: Jia F. , Peng H. , Ji X. , Zhang X. , Shen J. 
Published: April 2023

Abstract
In this work, SiC coatings varying in content were prepared on carbon-fiber-reinforced silicon-carbide composite (C/SiC) substrates in order to study the effect of free silicon on oxidation resistance. The coatings were formed in a vacuum atmosphere by means of pack cementation using a powder mixture ranging in content as follows: 20-50 wt% SiC, 20-60 wt% Si, 7-12 wt% graphite, and 6-10 wt% Al2O3. Coating surface and cross-sectional morphologies were examined using SEM, EDS, and semiquantitative XRD analysis and oxidation resistance was determined by cyclic oxidation testing in air at 1300 °C. The results show that cracks and voids decrease with increasing free silicon content and that coatings with an appropriate amount of free silicon have better oxidation resistance than those with no free silicon at all. However, further increases in silicon content were found to be detrimental to oxidation behavior for a number of reasons that are discussed.
Sliding Wear Investigation of Plasma and High Velocity Oxy-Fuel Sprayed Alumina Coatings
Authors: Ali O. , Ahmed R. , Alawadhi H. , Shameer M. 
Published: April 2023

Abstract
This work investigates the sliding wear resistance of alumina coatings deposited on stainless steel substrates by HVOF and air plasma spraying, using fine (1-5 μm) and conventional (10-45 μm) powders. Sliding wear tests were carried out using a sintered WC-Co ball as the counter-body and the wear tracks were examined to obtain a better understanding of wear mechanisms. HVOF coatings showed an order of magnitude improvement in wear resistance compared to their APS counterparts. The disparity in wear performance is correlated to differences in phase composition, porosity, hardness, and fracture toughness as revealed by SEM and XRD analysis and nanoindentation testing. The development of tribofilms and their role in wear behavior is also discussed.
Microstructure and Tribological Performance of Cr7C3-(Ni,Cr)3(Al,Cr) Coating Deposited from Cr7C3 In-Situ Synthesized Alloy Powder
Authors: Hongbin Z. , Jie S. , Feng G. , Yueguang Y. , Changhai L. 
Published: April 2023

Abstract
In this investigation, spherical Cr7C3-(Ni,Cr)3(Al,Cr) powder with different compositions was prepared by vacuum melting and gas atomization. During the solidification process, Cr7C3 is in-situ synthesized and uniformly distributed in the Cr-doped Ni3Al phase. Coatings produced from the powders by HVOF spraying were characterized based on composition, microstructure, hardness, and tribological properties. The results show that the coatings compare well with commercial Cr3C2-NiCr coatings used on piston rings in heavy duty diesel engines. Optimization routes for further improvement are also discussed.
Improving Corrosion Resistance of Al6061 Coating Deposited by an In-Situ Shot-Peening Assisted Cold Spray
Authors: Wei Y.-K. , Luo X.-T. , Li C.-J. 
Published: April 2023

Abstract
This study demonstrates a novel method for improving the corrosion resistance of cold sprayed Al6061 coatings. Large stainless steel particles were added to a commercial Al6061 powder and the mixture was deposited on Mg alloy AZ31B substrates using nitrogen gas at low working pressure and temperature. It is shown that the stainless steel particles had a shot-peening effect, thus increasing the density as well as the corrosion resistance of Al6061 coatings. SEM examination showed that no stainless steel particles were incorporated in the coating.
Preparation and Characterization of (La0.9Ca0.1)(Cr0.9Mg0.1)O3 High Emissivity Coatings Deposited by APS
Authors: Yanbo L. , Quansheng W. , Lihong G. , Yunpeng C. , Zijian J. , Hao W. 
Published: April 2023

Abstract
In this study, (La0.9Ca0.1)(Cr0.9Mg0.1)O3 ceramic powders prepared by solid-state synthesis were deposited on nickel-base superalloy substrates by atmospheric plasma spraying. Powder morphology and coating surfaces were examined by SEM, and composition and phase structure were evaluated by EDS and XRD. Coating porosity and bond strength were measured and emissivity and thermal shock tests were carried out. The results show that the powders maintained their perovskite structure during spraying and that no impurities were introduced in flight. The emissivity of the coatings was found to be 0.88 at 600 °C and 0.89 at 800 °C, which is attributed to lattice distortion stemming from differences between doping and original ions and the valence states of Mg2+ and Cr3+. Coating crystal structure was stable over the thermal shock range from room temperature to 1100 °C and no spalling or fracture occurred after ten shock cycles.
AVALIAÇÃO DO FATOR DE PROTEÇÃO SOLAR IN VITRO E DESENVOLVIMENTO DE GEL CONTENDO EXTRATO DE VITIS LABRUSCA
Authors: Jusvick Alessandra , Quatrin Rafaela , Schons Adelise Maiane , Pagno Andressa Rodrigues , Piana Mariana 
Published: April 2023

Vitis labrusca é popularmente conhecida como videira. Essa espécie vem ganhando destaque no mercado cosmético por apresentar características ímpares, como atividades antioxidante, antiinflamatória, antimicrobiana, dentre inúmeras outras, por apresentarem grande quantidade de compostos fenólicos. O objetivo deste trabalho foi avaliar o fator de fotoproteção do extrato das folhas de Vitis labrusca frente aos raios ultravioleta B e desenvolver uma formulação cosmética contendo este extrato. A quantificação de flavonoides foi realizada de acordo com Woisky e Salatino (2015), o fator de proteção solar de acordo com Mansur et al. (1986) e o estudo de estabilidade preliminar de acordo com Guia de produtos cosméticos (2004). O extrato apresentou fator de proteção entre 0,22 e 9,2 mg% de flavonoides. O gel desenvolvido, contendo 3% do extrato das folhas de V. labrusca apresentou estabilidade preliminar adequada. O fator de proteção B foi considerado baixo apesar de apresentar quantidade considerável de flavonoides, sugere-se que o extrato possa ser avaliado quanto a sua capacidade antioxidante.
Religious Nationalism, Strategic Detachment and the Politics of Vernacular Humanitarianism in Post-War Sri Lanka
Authors: Widger Tom 
Published: April 2023

Abstract
In this article, I am concerned with the ways different ethnic and religious groups in contemporary Sri Lanka use rhetorics of humanitarianism. Exploring a range of examples drawn from an inner city community, humanitarian foundations and national government, I show how different actors deploy cosmopolitan and nationalist humanitarian rhetorics to obfuscate claims of war crimes and communal favouritism on the one side, and to encourage allegiance to a national Sri Lankan identity on the other side. I introduce a concept of strategic detachment to help illuminate the ways minority groups in particular seek to cultivate distance from their contested ethnic and religious identities and in so doing re-signify their humanitarian practices as self-consciously non-partisan.

Dans cet article, nous analysons la rhétorique de l'humanitarisme utilisée par les différents groupes ethniques et religieux en Sri Lanka à l’époque contemporaine. En étudiant plusieurs exemples tirés d'une communauté située au centre-ville, des fondations humanitaires, et du gouvernement national, nous montrons les stratégies menées par les différents acteurs pour adapter la rhétorique cosmopolite, nationaliste et humanitaire. Leur but est, à la fois, d'obfusquer les prétentions concernant les crimes de guerre et du favoritisme communal, et d'encourager l'allégeance à l'identité nationale de Sri Lanka. Nous proposons un concept dit ‘strategic detachment’ (le détachement stratégique) pour illuminer les façons dont les minorités cherchent à cultiver la distance par rapport à leurs identités ethniques et religieuses, et en même temps de redéfinir clairement leurs pratiques humanitaires en termes non-partisans.
Pelatihan Penggunaan Repositori Arsip Digital Manuskrip Bagi Pegawai Museum Sang Nila Utama
Authors: Sudiar Nining , Idayanti Iik , Latiar Hadira 
Published: April 2023

The current target community service partners are Sang Nila Utama Museum employees. This service is a continuation of research activities regarding the design of the manuscript repository for the Sang Nila Utama Museum collection. Currently, all manuscript collections have been recorded, however, the public still cannot access these digital manuscripts easily, this is because the person in charge of the museum and their employees do not yet have an understanding of the advantages of using a repository. Seeing these conditions, it is necessary to conduct training for employees regarding the use of the repository. The purpose of this activity, namely (1) to provide knowledge to employees about the repository; (2) to Employees have knowledge and understanding of the use of repository services. In order to achieve the above objectives, it is necessary to hold activities, including (1) Counseling related to the museum collection repository and manuscripts; (2) brief training on using the repository service. Participants who took part in the activity totaled 5 people. The results of the service show that at first, the participants did not have an understanding of repository services, but after counseling, the participants understood the meaning and function of repository services. It is hoped that in the future, this repository service can be applied to all collections, not only manuscripts but other museum collection objects.
Keywords: training, repository, digital manuscripts.
Pendampingan dan Penyuluhan Layanan Restorasi (Penyelamatan Arsip) Keluarga ( Laraska) di Desa Sasak Panjang Tajur Halang Bogor
Authors: Nurdiansyah Aulia , Dewiki Santi , Utami Herwati Dwi , Wahyono Efendi , Samsiyah Siti , Maharani Dewi , Hermawati Yanti 
Published: April 2023

Abstract
The title of this community service (PKM) is Assistance and Counseling on Family Restoration (Archives Rescue) Services (LARASKA) in Sasak Panjang Tajur Halang Village, Bogor. The purpose of this PKM activity is that it is hoped that the Laraska program in Sasak Panjang Tajur Halang Village, Bogor, can be an incentive for other communities to take advantage of the LARASKA program. This program can later become a sustainable program among residents. In this LARASKA Program, several methods are used: Lecture method; discussion method; Simulation, and practice methods. There are two activities in archival restoration, namely encapsulation, and lamination. The team chose the encapsulation activity because document lamination or laminating press activities could damage documents. The writing in the document will stick to the laminating plastic. Documents such as diplomas, certificates, marriage certificates are acid free. Simple maintenance can make documents last up to 100 years without the need for lamination. If you need to do lamination, that's fine, but the team doesn't recommend lamination and if you have to do lamination, you can do lamination but not the press method, just like on the cover but don't forget to leave a little cavity for air circulation.

Abstrak
Judul pengabdian kepada masyarakat (PKM) ini adalah Pendampingan dan Penyuluhan Layanan Restorasi (penyelamatan arsip) Keluarga (LARASKA) di Desa Sasak Panjang Tajur Halang Bogor. Tujuan kegiatan PKM ini diharapkan program Laraska di Desa Sasak Panjang Tajur Halang Bogor tersebut dapat menjadi pendorong masyarakat lainnya untuk memanfaatkan program LARASKA. Program ini nantinya dapat menjadi program berkesinambungan antarwarga. Dalam Program LARASKA ini, digunakan beberapa metode, antara lain: Metode ceramah; Metode diskusi; Metode simulasi dan praktik. Terdapat dua kegiatan dalam restorasi arsip yaitu dengan enkapsulasi dan laminasi. Tim memilih kegiatan enkapsulasi, karena kegiatan laminasi dokumen atau laminating press dapat merusak dokumen. Tulisan dalam dokumen akan menempel di plastik laminating. Dokumen seperti ijazah, akta, surat nikah sudah bebas dari asam. Perawatan sederhana dapat membuat dokumen tahan sampai dengan 100 tahun tanpa perlu dilaminasi. Bilamana perlu dilakukan tindakan dilaminasi boleh saja, namun tim tidak merekomendasikan tindakan laminasi dan apabila terpaksa melakukan laminasi, dapat dilakukan laminasi tetapi bukan cara press, hanya seperti disampul namun jangan lupa untuk memberikan rongga sedikit untuk sirkulasi udara.