大气等离子喷涂制备莫来石涂层的性能
Characteristics of Mullite Coatings Prepared by Air Plasma Spraying
查看参考文献14篇
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文摘
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采用大气等离子喷涂制备莫来石涂层,对涂层进行了热震试验。以OLYCIA m3图像分析软件测定涂层孔隙率,以MH-5-VM型显微硬度仪测定涂层硬度,依照ASTMC633-79标准测定涂层结合强度,以X射线衍射(XRD)和扫描电镜(SEM)表征涂层的相组成和微观形貌。结果表明,莫来石涂层主要由变形颗粒、未熔融粉末及少量孔隙组成,涂层中没有微观裂纹;涂层中含有莫来石晶体和部分非晶态玻璃相;热震过程中,涂层中的非晶转变为晶态莫来石,同时伴随应力释放,导致涂层出现微观裂纹。 |
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其他语种文摘
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The mullite coatings were prepared by air plasma sprayed.The as-sprayed coating were carried out thermal shock experiment.The porosity and microhardness were measured by OLYCIA m3 image analysis software and MH-5-VM microhardness tester,respectively.The bond strength of mullite coatings were determined according to ASTM C633-79 standard.The composition and morphology of the mullite coatings were examined by X-ray diffraction(XRD)and scanning electron microscope(SEM).The results show that as-sprayed coating includes splats grains,partially melted powders and a few pores.The microcracks do not appear in the coating.The as-sprayed coating is largely crystal mullite and only a small quantity of amorphous phase.During thermal shock experiment,amorphous phase in coating changes to crystal mullite and gives rise to stress,leading to microcracks. |
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来源
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材料导报
,2011,25(1B):36-39 【核心库】
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关键词
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大气等离子喷涂
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莫来石涂层
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热震试验
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非晶
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地址
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中国科学院兰州化学物理研究所, 固体润滑国家重点实验室, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-023X |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金创新研究群体项目
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文献收藏号
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CSCD:4236223
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