bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nanostructure Development of Low Pressure Plasma Sprayed Coatings with Nano-Agglomerated YSZ Feedstock
Authors: Gao Y. , Yang D. 
Published: April 2023

Abstract
In this study, an internal injection plasma torch is used to deposit nano-agglomerated YSZ feedstock powders on superalloy substrates at low ambient pressures ranging from 5000 Pa to 6000 Pa. Coatings with unique fully nano-equiaxed structures were obtained when operating the torch below 300 A. With increasing current, up to 700 A, coatings with mixed-grain and eventually large-grain structures were produced. Experimental results suggest that the equiaxed nanoscale structure derives from the original agglomerated nanoparticles that had undergone melting while inside the nozzle of the plasma torch and were subsequently solidified or sintered in the coating. Coating hardness and elastic modulus were also measured and are shown to correspond with microstructure.
Flexure Strength of Metal Mesh Reinforced Ceramic Matrix Composite Fabricated Using Plasma Spray Method
Authors: Mohammadi T. , Huang X. 
Published: April 2023

Abstract
Many ceramic materials are microstructurally stable at high temperatures, but exhibit poor mechanical properties under load. In this study, a Ni-base superalloy wire mesh is used as a reinforcement to strengthen a 6.15 mm thick layer of plasma-sprayed YSZ. The flexural performance of the ceramic matrix composite (CMC), as determined by a three-point bend test, exceeds that of monolithic YSZ in terms of peak load and displacement before fracture. Heat treatment of the CMC further increases the load at the onset of crack initiation due to enhanced bonding between the constituent materials.
The Evaluation of Mechanical Properties of Suspension Plasma Sprayed Zirconia Coatings Having Various Microstructures
Authors: Sokołowski P. , Mejias A. , Chicot D. , Musalek R. , Nylen P. , Pawłowski L. 
Published: April 2023

Abstract
This paper examines the microstructure and morphology of zirconia coatings and demonstrates the calculation of elastic modulus and Martens hardness based on instrumented indentation test results. Coatings samples varying in microstructure, phase content, and chemical composition were deposited by suspension plasma spraying using different torches and different suspension formulations. Coatings produced from low-concentration suspensions with submicron-size powders had a columnar structure with long vertical pores between the columns and fine spherical pores within the columns. Coatings made from suspensions with high concentrations of solids and coarser, more irregular powders, on the other hand, were more uniform and their surfaces smoother. They are also shown to be harder and have higher elastic modulus based on indentation test results.
Residual Stresses Measurement in Plasma Sprayed TBCs with Cold Sprayed Bond Coats by Photoluminescence Piezospectroscopy
Authors: Lima C. R. C. , Dosta S. , Guilemany J. M. , Clarke D. R. 
Published: April 2023

Abstract
A non-destructive inspection technique known as photoluminescence piezospectroscopy (PLPS) has been used to measure residual stresses in thermally grown oxide layers in TBCs subjected to thermal cycling at 1121 °C. YSZ topcoats were applied by atmospheric plasma spraying on cold-sprayed bond-coated Ni superalloy substrates. Residual stresses were analyzed as a function of thermal exposure. Changes in stress were used to indicate spallation and damage degree in the coating system.
Process Simulation & Modeling in HVOF Qualification and Optimization
Authors: Zeng L. , Ramsey B. 
Published: April 2023

Abstract
In this work, process models combining statistics, materials science, and mechanics were developed to optimize and qualify HVOF sprayed coatings as if for aerospace application. In an attempt to correlate process variables with typical coating properties, a preliminary microstructure model was developed using statistical data obtained from 34 design-of-experiments runs. A second model, based on fatigue testing, was also developed. The fatigue model was subsequently used to guide the selection of variables for a final model that is shown to aid in both process qualification and the optimization of process-operating parameters.
Performance and Economic Characteristics of Multi-Chamber Detonation Sprayer Used in Thermal Spray Technology
Authors: Tyurin Y. , Kolisnichenko O. , Jia J. , Vasilik N. , Kovaleva M. , Prozorova M. , Arseenko M. , Sirota V. 
Published: April 2023

Abstract
This paper describes the basic design and operation of a multi-chamber detonation sprayer (MCDS) and explains how it differs from conventional detonation sprayers and other spraying methods. It presents and analyzes ceramic, metal, and cermet coatings produced with the new sprayer, highlighting its ability to deposit low-melting point and refractory materials. It compares the efficiency and operating costs of the MCDS with some of the more common HVOF torches and reviews the coating properties that have been achieved with different powders and spraying parameters.
An Investigation of the Corrosion and Fouling Resistance of ZnNi/Cr2O3-TiO2-CuO-SiO2/PTFE Composite Ceramic Coatings
Authors: Li Q.-Y. , Cheng X.-D. , Ye W.-P. 
Published: April 2023

Abstract
This study investigates the formation of ZnNi/Cr2O3-TiO2-CuO-SiO2/PTFE composite ceramic coatings by atmospheric plasma spraying and assesses their ability to improve the corrosion, friction, and wear performance of reciprocating parts. The as-sprayed coatings were examined then subjected to a series of tests to evaluate corrosion and fouling resistance. Reciprocating parts that had been coated were relatively intact after 5000 h in a realistic ocean environment. Cyclical changes in coating weights were found to be influenced by the dissolution of oxide films and the accumulation of secondary products. PTFE proved to be an effective sealing agent, reducing mass loss and porosity by approximately 30%.
Hierarchical Macro/Nano Titanium Coating Promotes Cell Differentiation Via ROCK-Regulated Synergistic Cytoskeletal Distribution
Authors: Pan H. , Xie Y. , Zheng X. , Tang T. 
Published: April 2023

Abstract
Nanomodified plasma-sprayed titanium coatings have been shown in various studies to improve the early osseointegration of orthopedic implants, although little attention has been paid to the interactions that occur between coating surfaces and osteoblast cells. The aim of this study is to determine how surface structure influences cytoskeleton distribution and cellular differentiation and to assess the role of topography in regulating osteogenic fate. The results show that synergistic effects are achieved on hierarchically structured surfaces, with better cell spreading on nanotexture and multidimensional cytoskeleton distribution occurring over rough macroporous structure. Evidence of greater cytoskeleton reorganization and higher intracellular tension was also revealed.
Dense YSZ Coatings Fabricated by Plasma Spray-Physical Vapor Deposition
Authors: Shao F. , Zhao H. , Liu C. , Zhong X. , Zhuang Y. , Ni J. , Tao S. 
Published: April 2023

Abstract
In the present work, YSZ coatings were deposited on graphite substrates by plasma spray-physical vapor deposition (PS-PVD) in order to study the influence of spray distance on microstructure and durability. Four coating samples were examined in detail via SEM and XRD analysis. The results show that the as-sprayed YSZ has a dense lamellar-columnar microstructure with low porosity. Both monoclinic and tetragonal zirconia were detected in the coatings along with ZrO2-x, the latter indicating that oxygen loss occurred at short spraying distances. Coating hardness and Young’s modulus were also measured and were found to vary with spraying distance as well.
Tubular Asymmetric La0.6Sr0.4Co0.2Fe0.8O3-δ Oxygen Transport Membranes Prepared by Plasma Spraying-Physical Vapor Deposition (PS-PVD) and Supersonic Air-Gas Plasma Spraying (SAPS)
Authors: Niu S. , Zhou K. , Xu L. , Deng C. , Liu M. , Mao J. 
Published: April 2023

Abstract
Tubular asymmetric LSCF oxygen transport membranes (OTMs) were prepared on stainless steel substrates by PS-PVD and supersonic air-gas plasma spraying (SAPS). The microstructure of the thermally sprayed OTMs is examined by cross-sectional imaging and oxygen permeability is assessed via oxygen permeation flux measurements carried out at atmospheric pressure in an air-helium gradient. The findings from the cross-sectional analysis and oxygen permeation tests are reported and discussed.
Study on the Thermal Spray Process and the Properties of WC-12Co and WC-10Co-4Cr Coatings
Authors: Zhu W. , Xu J. , Wang Q. , Tan X. 
Published: April 2023

Abstract
WC-Co and WC-Co-Cr coatings were deposited on Q345 steel substrates by HVOF and plasma spraying. Coating hardness was measured and corrosion and wear tests were conducted. In terms of hardness and density, the HVOF sprayed WC-Co coating is shown to be superior to its plasma sprayed counterpart. The WC-Co-Cr coatings, on the other hand, exhibited better wear and corrosion resistance, especially the coating produced by HVOF spraying.
Laser Re-Melting Assisted with Induction Heating of Yttria Partially Stabilized Zirconia Thermal Barrier Coatings
Authors: Wang R. , Dong X. , Fan Z. , Wang K. , Duan W. , Mei X. , Wang W. , Cui J. 
Published: April 2023

Abstract
This study investigates the effects of laser remelting on plasma sprayed YSZ thermal barrier coatings using a pulsed laser with and without induction preheating. It is shown that induction preheating decreases the laser threshold energy required for full remelting, which effectively reduces crack density. Induction preheating also helps in developing a steadier melt temperature and in decreasing thermal gradients between successive remelting passes. XRD analysis shows that it can reduce the amount of monoclinic phase as well.
Characterization of CrMoBW-Fe Base In-Flight Particles and Splats Fabricated by Nano Cored Wire Arc Spraying
Authors: Man T. , Kiattisak M. , Komsanti C. , Sittichai W. 
Published: April 2023

Abstract
This study investigates the relationship between in-flight particle characteristics, splat formation, and microstructure of CrMoBW-Fe base nanocomposite coatings produced by wire arc spraying. Focused ion beam milling was used to prepare transversal cross-sections of in-flight particles and splats for SE-SEM, EDS, and XRD analysis. The results show that particle size and splat morphology greatly influence the microstructure and properties of the coatings. In-flight particles were found to have a spherical shape with a broad size distribution ranging from 0.8 to 115 μm. The particles were well flattened on impact, resulting in flower-shaped splats with an average diameter of 100 μm. Splats were very thin with fine lamella structure, implying that the particles were fully melted at the time of impact.
Research to the Coating Properties of Different Nickel-Chromium Alloy for Cr3C2-25%NiCr Powders by High Velocity Oxygen Fuel Spray
Authors: Li Z. , Yu Y. 
Published: April 2023

Abstract
In this study, 1-1.5 μm chromium carbide particles are used to prepare CrC-NiCr and CrC-Ni-Cr powders by spray drying and vacuum sintering with the aim of optimizing the properties while minimizing the cost of HVOF-sprayed NiCr-CrC coatings. The powders are characterized by means of SEM and XRD analysis and the coatings are evaluated based on microstructure, microhardness, bonding strength, and erosion resistance.
Tribological Behavior of Arc Sprayed and Compressed Coatings with Different Carbide Grain Size Fraction
Authors: Tillmann W. , Hagen L. , Schröder P. 
Published: April 2023

Abstract
This study assesses the effect of machine hammer peening (MHP) and carbide grain size fraction on the friction and wear behavior of arc-sprayed WC-W2C FeCMnSi coatings. SEM examination shows that post-treatment by MHP compresses the coating, reducing both thickness and porosity, particularly in coatings with ultrafine carbides. The treatments also cause cracking, however, especially in carbide phases. Ball-on-disk tests were carried out on as-sprayed and treated samples to determine sliding wear and friction properties, and dry sand rubber wheel tests were used to evaluate abrasion resistance. SEM and EDX analyses before and after wear testing show how coating microstructure and grain size correlate with the friction and wear test results obtained and the given surface treatments.
Cold Spray Coatings for Spacecrafts Low-Temperature Soldering Application
Authors: Cui Q. , Zhang J. , Bai J. , Zhang L. , Wang B. , Ma G. , Wen C. , Li L. , Wen Q. 
Published: April 2023

Abstract
In this study, cold sprayed Cu approximately 40 to 60 μm in thickness is deposited on 6063 and LD10 aluminum plate to improve wettability for low temperature soldering and to serve as a barrier layer to protect the substrate from gallium diffusion originating in the solder paste. The effect of the coating on wettability, diffusion, solder joint interface microstructure, and shear strength is investigated in detail.
Effect of Nozzle Material on Downstream Lateral Injection Cold Spray Performance
Authors: MacDonald D. , Leblanc-Robert S. , Fernández R. , Farjam A. , Jodoin B. 
Published: April 2023

Abstract
This study investigates the effect of nozzle material on cold sprayed aluminum coatings produced using a downstream lateral injection system. It is shown through experimentation that nozzle material has a significant impact on deposition efficiency and particle velocity. It is proposed that the effects are related to complex interactions between particles and internal nozzle walls. The results obtained lead to the conclusion that nozzles with higher thermal diffusivity transfer more heat to particles when they make contact with internal surfaces, which increases deposition efficiency even though particle velocities are reduced.
Feature of Interfacial Bonding Achieved by Medium-Velocity Particle Impacts In Cold Spray
Authors: Li Y.-J. , Wei Y.-K. , Luo X.-T. , Li C.-J. 
Published: April 2023

Abstract
Interparticle bonding is considered the most important factor in cold sprayed coatings, determining mechanical properties as well as physical and chemical behaviors. In this study, a Cu feedstock with low oxygen content is deposited with relatively high spray pressure and temperature in order to improve interparticle bonding and obtain a coating cohesive strength. Mechanical bonding between deposited particles is deduced from fracture morphology and the deformation behavior of Cu particles is simulated by finite element analysis.
Flame Sprayed HDPE-Cu Composite Coatings: An Innovative Technique for Constructing Antifouling Layers
Authors: Jia Z. M. , Suo X. K. , Gong Y. F. , Liu Y. , Jin P. P. , Li H. 
Published: April 2023

Abstract
This paper describes the fabrication of corrosion-resistant HDPE coatings with antifouling properties achieved through the dispersion of Cu particles. The main feedstock powder was prepared by coating HDPE particles with a 1 μm thick Cu shell via electroless plating. The coated particles were flame sprayed as a topcoat over HDPE and Cu layers that had been deposited on mild steel substrates. SEM, EDS, and XRD analysis was used to examine the coatings and feedstock powders. After neutral salt spray testing for 14 days, the HDPE-Cu coatings were found to be relatively intact. Coating samples of various types were also immersed in bacteria-containing artificial seawater for three days. Field-emission SEM showed that the attachment of Bacillus sp., which successfully colonized on HDPE surfaces, was significantly constrained on pure copper and HDPE-Cu composite coatings. Some of the proposed theories on how Cu ions inhibit the formation of biofilms are discussed.
Influence of HVOF Spray Process on Performances of NiCrAl Coatings
Authors: Lu X. , Ji X. , Hou W. , Shen J. 
Published: April 2023

Abstract
This paper presents research results showing how spraying distance affects the bonding strength, porosity, microhardness, and deposition efficiency of HVOF-sprayed NiCrAl coatings. The coatings examined were deposited on quenched 1045 steel substrates at spraying distances of 340, 360, and 380 mm. At the optimal standoff distance of 360 mm with kerosene and oxygen flow rates at 22 L/h and 850 L/min, respectively, NiCrAl coatings were achieved with a bonding strength of 66 MPa, microhardness of 418.56 HV0.3, porosity of 1.1%, and deposition efficiency of 65.3%.
Nitrogen-Dioxide Sensing Properties of Solution Precursor Plasma Sprayed Zinc Oxide Coatings with Oxygen Vacancies
Authors: Zhang C. , Geng X. , Wang J. , You J. 
Published: April 2023

Abstract
This study investigates the feasibility of using solution precursor plasma sprayed (SPPS) zinc oxide to fabricate NO2 gas sensors. In the experiments, thin ZnO layers were deposited on Al2O3 substrates that had been printed with interdigitated gold electrodes. FE-SEM images show that the as-sprayed films are highly porous and nanostructured as desired. Diffuse reflectance measurements reveal that significant absorption occurs in the visible light range. In gas sensing tests, the SPPS ZnO films were responsive to concentrations of NO2 gas down to 0.4 ppm. The performance is attributed to the porous nanostructure and the presence of oxygen vacancies, or mid-bandgap defects, as confirmed by XPS analysis.
Effect of TiO2 and TiB2 Compounds on the Microstructure and Infrared Emissivity of Spinel Ni-Cr Oxide Coatings Prepared by APS
Authors: Zou J. , Ye W. P. , Dong S. R. , Nie Z. , Cheng X. D. 
Published: April 2023

Abstract
In this study, high-emissivity NiCr oxide coatings, one with TiO2 and one with TiB2 compounds, were deposited on stainless steel substrates by spray granulation and atmospheric plasma spraying. The main phases in both coatings are NiTiO3, spinel (NiCr2O4), and residual Cr2O3. The emissivity of the layer with TiO2 was found to be higher in the 2.5-8 μm range than that of the layer with TiB2, which is attributed to higher surface roughness and larger particle size. These results indicate that the NiCr oxide coatings with TiO2 compounds are more suitable for high-temperature IR applications.
Vacuum Plasma Spray of Yttria Stabilized Zirconia Coatings
Authors: Xu P. , Pershin L. , Coyle T. W. , Mostaghimi J. 
Published: April 2023

Abstract
In this study, zirconia coatings were fabricated by vacuum plasma spraying using hollow spherical and fused and crushed YSZ powders. Relationships between spray parameters and in-flight particle velocities and temperatures were investigated in real time and correlated with coating microstructure and density obtained under vacuum as well as atmospheric spraying conditions. The results indicate that plasma sprayed particles reach higher velocities under vacuum and slightly higher temperatures in atmospheric conditions. Powder morphology and structure play a major role in determining coating microstructure and porosity, especially in vacuum spraying. The fused and crushed powder yielded the densest coatings under the vacuum process conditions employed.
Effect of Oxidation on the Bonding Formation of Plasma-Sprayed Stainless Steel Splats Sprayed onto Stainless Steel Substrate
Authors: Wang J. , Li C.-J. 
Published: April 2023

Abstract
In this study, stainless steel splats were deposited on preheated stainless steel substrates with oxide scales of different thickness in inert low-pressure plasma spay (LPPS) conditions to examine the effect of in-situ oxidation of prior splats on the morphology and bonding of subsequently formed splats. Splat-substrate interface cross-sections were prepared by focus-ion-beam milling. Splat morphology and bonding state with the substrate were characterized by SEM. The results show that with oxide films up to 35 nm thick, disk-type splats are deposited that bond well to the substrate except in the periphery region. As oxide films become thicker (100 nm) and present a surface with micro-scale roughness, splats take on a finger-like shape with poor bonding at the interface.
Plurality of Activisms
Authors: National District (Sakha Republic) The Indigenous Women's Collectives , Nikolaeva Sardana 
Published: April 2023

Abstract
Indigenous women's activism occupies a specific niche within local and global Indigenous politics and plays a particularly important role in the socio-cultural and political development of Indigenous communities. In this regard, it is vital to explore not only activist strategies of grassroots Indigenous women's organizing but also their histories, contexts, and activist scopes. The women's collectives in the Olenek Evenki National District of the Sakha Republic (Russian Federation) have a long history of cultural and political activism. In this photo-essay, we aim to narrativize women's activism in Olenek as well as visually represent the activists themselves. Through the photos and the analytical narratives complimenting them, we also want to explore distinct (and diverse) articulations of Indigenous identities and of Indigenous activisms in the post-Soviet Indigenous Arctic.
Book Reviews
Authors: Abbe Spencer , Arakchaa Tayana , Yamin-Pasternak Sveta 
Published: April 2023

Tunguska: A Siberian Mystery and Its Environmental Legacy Andy Bruno
(Cambridge, UK: Cambridge University Press, 2022), 305 pp. ISBN 978-1-108-84091-0.
Galvanizing Nostalgia? Indigeneity and Sovereignty in Siberia Marjorie Mandelstam Balzer (Ithaca, NY: Cornell University Press, 2021), 270 pp. ISBN: 978-1501761317.
Prikladnaia etnologiia Chukotki: Narodnye znaniia, muzei, kul'turnoe nasledie (K 125-letiiu poezdki N.L. Gondatti na Chukotskii poluostrov v 1895 godu): Kollektivnaia monografiia [Applied ethnology in Chukotka: Indigenous knowledge, museums, cultural heritage (Celebrating 125th Anniversary of N.L. Gondatti's Trip to the Chukchi Peninsula in 1895)] O. P. Kolomiets and I. I. Krupnik, eds. (Moscow: PressPass, 2020), 468 pp.
PEMBUATAN SIRUP BERAS KETAN GILING DENGAN HIDROLISA ENZIMATIS
Authors: Merkuriana Merkuriana 
Published: April 2023

Pemanfaatan beras ketan untuk komoditi yang lebih berguna belum begitu banyak dilakukan. Dapat difikirkan pembuatan sirup dari beras ketan giling yang dapat menghasilkan sirup maltosa.Beras ketan giling diambil patinya. Pati beras ketan berbentuk serbuk halus dan berwana putih mengandung 83.36 % pati ; 70.71% air ; 0.45 % abu.Penelitian tentang prosses Hidrolisa Enzimatis tepung beras ketan giling dijalankan dalam water bath yang dilengkapi dengan penggoyang (berfungsi sebagai pengaduk). Proses ini mengikuti 2 langkah , yaitu : gelatinisasi dan sakarifikasi dengan enzim amilase yang diperoleh dari ekstrak secara kasar dari kecambah kedelai puth. Analisa maltosa yang terjadi dalam campuran dilakukan dengan metode Lane dan Eynon. Keadaan proses yang relatif baik pada penelitian ini yaitu pada :
Waktu hidrolisa : 2.5 jam ; Suhu hidrolisa : 65oC ; pH enzim : 5.7