Journal of Materials Research and Technology-Jmr&t最新文献

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Defending against fluorine corrosion: Insights from FeCoNiCrMo high-entropy alloy behavior in hydrofluoric acid solutions
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.097
{"title":"Defending against fluorine corrosion: Insights from FeCoNiCrMo high-entropy alloy behavior in hydrofluoric acid solutions","authors":"","doi":"10.1016/j.jmrt.2024.09.097","DOIUrl":"10.1016/j.jmrt.2024.09.097","url":null,"abstract":"<div><p>The surging demand for advanced fluorine corrosion-resistant materials underscores their significance in ensuring operational safety and reliability across various industries. This study investigates the corrosion behavior of the FeCoNiCrMo high-entropy alloy (HEA) <em>via</em> a series of 28-day immersion tests in hydrofluoric acid (HF) solutions. The results demonstrate the FeCoNiCrMo HEA's superior corrosion-resistant performance in HF environments, exhibiting remarkably low corrosion rates of 0.179 mm/y, 0.276 mm/y, and 0.352 mm/y in 20 vol%, 30 vol%, and 40 vol% HF solutions, respectively. Comprehensive phase and microstructural characterizations were conducted on samples exposed to the 40 vol% HF solution to elucidate the corrosion mechanisms. The study revealed that localized pitting corrosion preferentially initiates within the interdendritic regions of the HEA matrix upon HF exposure. During the intermediate stage, micro-galvanic corrosion occurs between the dendritic arms and interdendritic regions, leading to the formation of a uniform and compact corrosion product film on the alloy surface. This film, enriched with Mo, Cr, and O, provides temporary protection. However, as corrosion progresses, the partial detachment of particulate corrosion products compromises the integrity of the film, resulting in increased dissolution within the interdendritic regions and the formation of irregular corrosion grooves in the later stage. These insights significantly enhance the understanding of the corrosion mechanisms of FeCoNiCrMo HEA in HF environments and provide valuable guidance for developing innovative protective materials designed for fluorine-rich engineering applications.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021021/pdfft?md5=380da516d67dfad02061f999e8907890&pid=1-s2.0-S2238785424021021-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced mechanical behavior and texture development of Al/Al2O3 composites produced by spark plasma sintering (SPS) and vacuum hot pressing (VHP) followed by simple shear extrusion (SSE)
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.079
{"title":"Enhanced mechanical behavior and texture development of Al/Al2O3 composites produced by spark plasma sintering (SPS) and vacuum hot pressing (VHP) followed by simple shear extrusion (SSE)","authors":"","doi":"10.1016/j.jmrt.2024.09.079","DOIUrl":"10.1016/j.jmrt.2024.09.079","url":null,"abstract":"<div><p>Green compacts of Al-3vol% Al2O3 composites were produced by powder metallurgy (PM) and subsequently processed by spark plasma sintering (SPS) and vacuum hot pressing (VHP). The manufactured samples were then processed by the simple shear extrusion (SSE) process. Three SSE dies with the distortion angles (α) of 8°, 10° and 22.5° were used in this study. The SPS-ed/SSE-ed specimens for α = 10° were successfully deformed up to sixteen passes, while the VHP-ed/SSE-ed samples failed after six passes. In addition, the SPS-ed sample for α = 22.5° only underwent one pass of SSE. The SPS-ed/SSE-ed composites resulted in the highest shear punch test (SPT) load, modified porosity amount and the best reinforcement redistribution, as compared to the vacuum sintering and stir-casting manufacturing methods, which was confirmed by microstructure evaluation and porosity measurements. The crystallographic texture of the SPS-ed/SSE-ed composites for α = 10° was investigated in the sixteenth pass using the X-ray method. The results of texture development showed the very low intensity of shear and cube texture with {100} &lt;011&gt; and {001} &lt;100&gt; components, subsequently.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020854/pdfft?md5=7a8c5cd510e816af555818d6ea8f7b2a&pid=1-s2.0-S2238785424020854-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of ultrasonic vibration on micro-arc oxidation behaviour of manganese aluminium bronze
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.038
{"title":"The influence of ultrasonic vibration on micro-arc oxidation behaviour of manganese aluminium bronze","authors":"","doi":"10.1016/j.jmrt.2024.09.038","DOIUrl":"10.1016/j.jmrt.2024.09.038","url":null,"abstract":"<div><p>As a promising material for marine engineering, the insufficient corrosion resistance of manganese aluminium bronze (MAB) alloy when exposed to the marine environment may limit its application. In the present work, micro-arc oxidation (MAO) of MAB alloy was conducted in an aluminate-based electrolyte with the influence of ultrasonic vibration (UV) examined. A porous ceramic film has been successfully produced on MAB via MAO, which exhibits dramatic increases in both film thickness and compactness after the introduction of UV. As a result, the ceramic film produced by ultrasound-assisted MAO (UMAO) exhibits an enhanced corrosion resistance relative to that via MAO, which also possesses a desired antifouling capability. Hence, the present work illustrates the influence of UV on the MAO behaviour of non-valve alloys and, more importantly, provides theoretical guidance for related surface modification strategies in marine engineering.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S223878542402043X/pdfft?md5=e3e5577827225336cc50401f9b9a6fb1&pid=1-s2.0-S223878542402043X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of pre-heat parameters and final-heat parameters on microstructure evolution and mechanical properties of Mg-Gd-Y-Zn-Zr alloy
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.113
{"title":"The effect of pre-heat parameters and final-heat parameters on microstructure evolution and mechanical properties of Mg-Gd-Y-Zn-Zr alloy","authors":"","doi":"10.1016/j.jmrt.2024.09.113","DOIUrl":"10.1016/j.jmrt.2024.09.113","url":null,"abstract":"<div><p>In this study, an ultra-high strength Mg-13Gd-4Y–0Zn-0.5Zr (wt.%) alloy with tensile yield strength (TYS) of 456 MPa and ultimate tensile strength (UTS) of 486 MPa was prepared by using different pre-heat parameters and subsequent final-heat treatment combined with backward extrusion (BE) deformation process. It was shown that the pre-heat teratment could significantly enhance the UTS and TYS of the secondary backward extruded (BEed) alloy compared with none treatment. The reason was that the pre-heat treatment promoted the particle stimulated nucleation (PSN) mechanism and continuous dynamic recrystallization (CDRX), significantly increasing the fraction of dynamic recrystallization (DRX). The strengthening of the secondary BEed alloy was attributed to the unique microstructure characteristics: (I) the fine DRXed grains pinned by dynamic precipitates, (II) the dense dynamic precipitation phases, (III) the effect of the fine-grain strengthening. However, the overly densely distributed second phase, which increased the local dislocation density due to the narrower spacing, made it difficult to prevent crack propagation and caused premature fracture of the alloy. In addition, the subsequent final-heat treatment also facilitated the precipitation of the second phases of the secondary BEed alloys and brought in the ultra-high mechanical properties.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021173/pdfft?md5=3375b82da2b29036492573270a3f78b3&pid=1-s2.0-S2238785424021173-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure control and DRX characteristics of Ni–Co–W superalloys affected by changing deformation direction on [001] columnar grain
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.110
{"title":"Microstructure control and DRX characteristics of Ni–Co–W superalloys affected by changing deformation direction on [001] columnar grain","authors":"","doi":"10.1016/j.jmrt.2024.09.110","DOIUrl":"10.1016/j.jmrt.2024.09.110","url":null,"abstract":"<div><p>Controlling the evolution process of columnar grains is benefits to achieve microstructure regulation during subsequent hot processing in superalloys. In present research, it takes a Ni–Co–W superalloy as an example, aims to clarify the underlying connections between the compression direction and dynamic recrystallization (DRX) behaviors in microstructure evolution. The compression direction (CD) was parallel or perpendicular to [001] columnar has been defined as CD∥[001] and CD⊥[001], respectively. The columnar evolution and DRX characteristics under two sets of experimental during hot deformation were identified deeply. The results show that complete DRX is more easily to occur when CD⊥[001], but fine DRX grains are tendency to form when CD∥[001]. DRX nucleation within CD∥[001] and CD⊥[001] deformed microstructure under dislocation energy was discussed deeply. The critical size of nucleation is decreased while the nucleation density is increased in CD∥[001] with high dislocation density, which benefits to form numerous fine DRX grains along the original columnar boundaries. In addition, according to Taylor factors (TFs) criterion, TFs difference will always existed in CD∥[001], which promotes the necklace structure gradually replaced columnar structure and some of them developed into fine DRX bands. With increasing of trues strain, TFs difference gradually decreased in CD⊥[001], DRX nucleation was inhibited, thus the existed DRX grains further grow and finally coarse DRX grains were obtained. The findings clarified the flow behaviors and DRX characteristics of [001] columnar in two directions, and then proposed a microstructure control mechanism of superalloys with [001] columnar based on deformation vector and evolution decomposition.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021148/pdfft?md5=8b37eb17d986f6b63af4a9e1a0c92190&pid=1-s2.0-S2238785424021148-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of tungsten carbide nanopowder by a one-step carbothermal reduction-carbonization method
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.107
{"title":"Synthesis of tungsten carbide nanopowder by a one-step carbothermal reduction-carbonization method","authors":"","doi":"10.1016/j.jmrt.2024.09.107","DOIUrl":"10.1016/j.jmrt.2024.09.107","url":null,"abstract":"<div><p>Tungsten carbide (WC) nanopowder is crucial for preparing high-performance WC-Co cemented carbides, but the synthesis of WC nanopowder still remains huge challenges. In this study, we report a novel method for synthesizing high-purity WC nanopowder by carbothermal reduction-carbonization. The effects of the reaction atmosphere, temperature, and time on the morphology and size of WC powder were studied. It was found that vacuum atmosphere was more conducive to prepare WC nanopowder, which could reduce the onset temperature of carbothermal reduction reaction and effectively improve the reaction efficiency. The final products in vacuum were more homogeneous and smaller compared with argon atmosphere. Furthermore, the mechanism of effect of atmosphere on prepared WC nanopowder was analyzed in detail. The particle size of WC showed an increasing trend with the increase of temperature and holding time. Following calcination at 1100 °C for 5 h, the as-prepared WC nanopowder attained an average particle size of 82 nm.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021124/pdfft?md5=72be1f79c1eed945d158f2bb70aa416c&pid=1-s2.0-S2238785424021124-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of aging treatment on the microstructure, cracking type and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.106
{"title":"Effect of aging treatment on the microstructure, cracking type and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam","authors":"","doi":"10.1016/j.jmrt.2024.09.106","DOIUrl":"10.1016/j.jmrt.2024.09.106","url":null,"abstract":"<div><p>This study aimed to provide a comprehensive understanding of how aging treatments (namely, HT1 and HT2) affect the microstructure, cracking behavior, and crystallographic texture of IN939 fabricated by powder bed fusion-laser beam (PBF-LB) method. Although both aged samples demonstrated similar grain structure and recrystallization behavior according to the electron backscatter diffraction (EBSD) analysis, as well as the precipitation of bimodal γ′ phase and MC- and M<sub>23</sub>C<sub>6</sub>-type carbides, notable differences were observed in the size and morphology, particularly the γ′ phase. The HT1 sample displayed coarsened primary γ′ phase, with sizes reaching up to 2 μm and exhibiting varied morphologies, including irregular and cuboidal shapes. Additionally, this treatment led to the formation of some γ′-γ eutectic regions and plate-like η phase, along with the decomposition of MC-type carbides into M<sub>23</sub>C<sub>6</sub>-type carbides. In contrast, the HT2 sample displayed uniformly distributed spherical primary γ′ phase with sizes ranging from 70 to 120 nm, accompanied by very fine secondary γ′ phase. Furthermore, it was found that changes in both aged sample microstructures could result in the formation of strain-age cracks due to the γ′ phase formation and liquation cracks due to the partial remelting of lower melting point phases. The findings also revealed that with the application of aging treatments, the hardness of the as-fabricated sample (339.8 ± 3.4 HV) increased to 440.2 ± 5.6 HV and 508.1 ± 4.8 HV for the heat treatment of HT1 and HT2, respectively.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021112/pdfft?md5=ed0a6225b7cbc411c0664d9d64f376d2&pid=1-s2.0-S2238785424021112-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigating the hot deformation behavior and microstructural evolution of Mo-14Re alloy at various strains and strain rates
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.094
{"title":"Investigating the hot deformation behavior and microstructural evolution of Mo-14Re alloy at various strains and strain rates","authors":"","doi":"10.1016/j.jmrt.2024.09.094","DOIUrl":"10.1016/j.jmrt.2024.09.094","url":null,"abstract":"<div><p>This study examines the hot deformation behavior of Mo-14Re alloy at various true strains (15%, 35%, 65%) and strain rates (0.01 s<sup>−1</sup>, 10 s<sup>−1</sup>) at a temperature of 1400K. The findings indicate that dynamic recovery (DRV) and dynamic recrystallization (DRX) occur concomitantly as strain increases at a low strain rate of 0.01 s<sup>−1</sup>, with DRV being the predominant softening mechanism. At a strain of 65%, DRX emerges as the primary softening process. Conversely, under high strain rates of 10 s<sup>−1</sup>, DRX is inhibited, and the Mo-14Re alloy experiences work hardening due to an increase in dislocation density. Microscopic analysis shows that the high-density dislocations facilitate the continued nucleation and growth of recrystallized grains at low strain rates. At high strain rates, tangled dislocations hinder dislocation motion and recrystallization. Regarding texture evolution, stronger {100}//CD and weaker {111}//CD fiber texture is observed at low strain rates of 0.01 s<sup>−1</sup>, while stronger {111}//CD and weaker {100}//CD fiber texture forms at high strain rates of 10 s<sup>−1</sup>, with enhanced texture intensity. Mechanistic analysis confirms the activation of the {110}&lt;111&gt;, {112}&lt;111&gt;, and {123}&lt;111&gt; dislocation slip systems at elevated temperatures, with the {123}&lt;111&gt; system being the most dominant.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021008/pdfft?md5=0a1b83839b932596f84b18ba4d470608&pid=1-s2.0-S2238785424021008-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-throughput determination of interdiffusivity and atomic mobilities in bcc Ti–Cr–Mo alloys
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-14 DOI: 10.1016/j.jmrt.2024.09.111
{"title":"High-throughput determination of interdiffusivity and atomic mobilities in bcc Ti–Cr–Mo alloys","authors":"","doi":"10.1016/j.jmrt.2024.09.111","DOIUrl":"10.1016/j.jmrt.2024.09.111","url":null,"abstract":"<div><p>A comprehensive understanding of the diffusion coefficients and atomic mobilities in the Ti–Cr–Mo system is crucial for establishing an atomic mobility database for titanium-based high-strength titanium alloys. In the present work, nine sets of solid/solid diffusion couples were prepared and measured in bcc Ti–Cr–Mo alloys, with the temperatures ranging from 1373 to 1473 K. Scanning electron microscopy (SEM), and Electro Probe Micro-Analysis (EPMA) techniques were used to respectively test its microstructure and composition distance. The diffusion coefficients in bcc Ti–Cr–Mo alloys were determined using the Matano-Kirkaldy method and numerical inverse method respectively. The diffusion coefficients obtained from the above two methods exhibit good consistency. The atomic mobility parameters for the Ti–Cr–Mo systems were provided with the assistance of HitDIC software. A three-dimensional plot of interdiffusivities was generated for chromium and molybdenum contents ranging from 0 to 20 mol % and 0–14 mol %. Moreover, the application of the Arrhenius equation enabled the determination of changes in frequency factors and activation energies concerning temperature and composition.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424021185/pdfft?md5=bf81aa63e586376b464784e9d5f0c6ea&pid=1-s2.0-S2238785424021185-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142238303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface roughness and fracture cracks of Al2O3/TiO2 composite coating by wet chemical mechanical grinding with structured abrasives pad 结构磨料垫湿化学机械研磨 Al2O3/TiO2 复合涂层的表面粗糙度和断裂裂纹
IF 6.2 2区 材料科学
Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-13 DOI: 10.1016/j.jmrt.2024.09.058
{"title":"Surface roughness and fracture cracks of Al2O3/TiO2 composite coating by wet chemical mechanical grinding with structured abrasives pad","authors":"","doi":"10.1016/j.jmrt.2024.09.058","DOIUrl":"10.1016/j.jmrt.2024.09.058","url":null,"abstract":"<div><p>In the fields of wind power, and other industries, the Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> coating is prepared and ground on the bearing ring, in order to obtain the insulation resisting the electrical erosion for the motors at high voltage. A novel wet chemical mechanical grinding (WCMG) method is proposed to finish this hard-brittle composite material, utilizing the structured diamond abrasives pad and the NaOH solution. The softened workpiece's surface under the chemical reaction was demonstrated by means of Raman spectrum, indentation and scratching tests. The analytical model of surface roughness and fracture cracks is established based on the synthesis of geometry and kinematics, contact mechanics, material removal and indentation fracture mechanics. The surface roughness of coating was reduced from initial <em>S</em><sub><em>a</em></sub> 3.293 μm down to final <em>S</em><sub><em>a</em></sub> 0.049 μm in the WCMG process with grain size 3 μm and pH 12.01, mostly attributed to the ductile removal of chemically softened coating surface.</p></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":null,"pages":null},"PeriodicalIF":6.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2238785424020635/pdfft?md5=454d61c8a2de8ea16d83946db7fbca49&pid=1-s2.0-S2238785424020635-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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