引用本文: | 王洪涛,姚海龙,易志海,白小波,陈清宇,纪岗昌.冷喷涂SiC/Al纳米复合涂层的组织结构与性能[J].中国表面工程,2018,31(6):98~108 |
| WANG Hongtao,YAO Hailong,YI Zhihai,BAI Xiaobo,CHEN Qingyu,JI Gangchang.Microstructure and Properties of Cold-sprayed SiC/Al Nanocomposite Coatings[J].China Surface Engineering,2018,31(6):98~108 |
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冷喷涂SiC/Al纳米复合涂层的组织结构与性能 |
王洪涛1,2, 姚海龙1,2, 易志海2, 白小波2, 陈清宇2, 纪岗昌1
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1.九江学院 江西省材料表面再制造工程技术研究中心, 九江 332005;2.九江学院 机械与材料工程学院, 九江 332005
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摘要: |
为制备基体相晶粒细小、增强相均匀分布的SiC/Al纳米复合涂层,以Al、SiC为原料,采用高能球磨法获得SiC颗粒弥散分布的纳米晶Al基复合材料粉末,利用冷喷涂技术低温成型制备了SiC/Al纳米复合涂层,分析了SiC含量对复合涂层相结构、晶粒尺寸、微观结构、硬度及磨损性能的影响规律。结果表明:冷喷涂可实现球磨纳米晶复合粉末结构的原位移植,所制备SiC/Al纳米复合涂层组织致密,微米及亚微米级SiC弥散分布在纳米晶Al(约80 nm)基体之上;SiC颗粒对Al基体有明显强化作用,冷喷涂SiC/Al纳米复合涂层的硬度随SiC体积分数的增加而显著增加,50% SiC/Al纳米复合涂层的硬度高达515 HV0.3,约为Al块材的13倍;冷喷涂SiC/Al纳米复合涂层的耐磨损性能随着SiC含量增加而显著提高,涂层磨损失效机制为磨粒对基体的切削犁沟变形。 |
关键词: 冷喷涂 纳米复合涂层 SiC/Al 组织结构 性能 |
DOI:10.11933/j.issn.1007-9289.20180901001 |
分类号:TG174.442 |
基金项目:国家自然科学基金(51001056,51561013);江西省自然科学基金(20151BAB206008) |
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Microstructure and Properties of Cold-sprayed SiC/Al Nanocomposite Coatings |
WANG Hongtao1,2, YAO Hailong1,2, YI Zhihai2, BAI Xiaobo2, CHEN Qingyu2, JI Gangchang1
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1.Jiangxi Province Engineering Research Center of Material Surface Enhancing & Remanufacturing, Jiujiang University, Jiujiang 332005, China;2.School of Mechanical and Material Engineering, Jiujiang University, Jiujiang 332005, China
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Abstract: |
To prepare SiC/Al nanocomposite coating with fine grains matrix and uniformly distributed reinforcement, the SiC/Al nanocomposite powders were first produced by a high energy ball milling process using pure Al and SiC powder as raw material. SiC/Al nanocomposite coatings were then successfully fabricated by cold spraying of the above-mentioned SiC/Al nanocomposite powder based on its low-temperature forming characteristics. The influence of SiC content on the phase structure, grain size, microstructure, microhardness and wear performance of the cold-sprayed SiC/Al nanocomposite coatings were analyzed. The results show that the structure of ball-milled SiC/Al nanocomposite powder can be in-situ transplanted into the coatings by cold spraying process. The cold-sprayed SiC/Al nanocomposite coatings have dense microstructure with Al matrix grain size about 80 nm and micro/sub-micrometer scale SiC particles are uniformly distributed in the matrix. SiC particles can obviously improve the strength of Al matrix, and the microhardness of SiC/Al nanocomposite coatings significantly increases with increasing volume fraction of SiC particles. The microhardness of 50% SiC/Al nanocomposite coating reaches 515 HV0.3, which is about 13 times that of Al bulk. Abrasive wear performance of SiC/Al nanocomposite coatings increases with increasing SiC content and the wear mechanism is the micro-cut effects of abrasive particles on the soft matrix surface. |
Key words: cold spraying nanocomposite coating SiC/Al microstructure property |