| 引用本文: | 贺文雄,吕志军,赵 健,隋少华.Ti-Al球磨粉反应等离子喷涂涂层的组织与性能[J].材料科学与工艺,2013,21(2):143-148.DOI:10.11951/j.issn.1005-0299.20130225. |
| HE Wen-xiong,L Zhi-jun,ZHAO Jian,SUI Shao-hua.Microstructure and properties of coatings prepared by reactive plasma spraying of Ti-Al milled powders[J].Materials Science and Technology,2013,21(2):143-148.DOI:10.11951/j.issn.1005-0299.20130225. |
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| 摘要: |
| 为制备Ti-Al金属间化合物复合涂层并研究其性能,以机械球磨的Ti-Al混合粉在Q235钢表面进行反应等离子喷涂实验,分别采用X射线衍射、扫描电子显微镜对涂层的成分、显微组织进行了分析,并测试了涂层的结合强度、显微硬度和耐腐蚀性能.结果表明:涂层由Al3Ti、TiN、Al2O3、少量TiAl与Ti3Al、以及残留的Al和Ti组成；球磨可促进喷涂时的反应,但喷涂时Al和Ti仍未完全反应,且在空气环境中喷涂容易氧化和氮化；涂层与基体之间是镶嵌式的机械结合,结合强度平均为30.24MPa；涂层表面的显微硬度平均为206.1HV,涂层的耐腐蚀性优于基体.总体上看,当球磨时间较长、电流较大、喷涂距离较大、气流量较小时,喷涂时的反应较充分,且涂层比较均匀、致密,其强度、硬度以及耐腐蚀性能较高. |
| 关键词: 反应等离子喷涂 机械球磨 Ti-Al金属间化合物 复合涂层 |
| DOI：10.11951/j.issn.1005-0299.20130225 |
| 分类号: |
| 基金项目:哈尔滨工业大学(威海)博士启动基金项目(HIT(WH)ZB200907). |
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| Microstructure and properties of coatings prepared by reactive plasma spraying of Ti-Al milled powders |
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HE Wen-xiong1,L Zhi-jun2,ZHAO Jian1,SUI Shao-hua1
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(1.School of Materials Science and Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China;2.Offshore Oil Engineering (Qingdao) Co.,LTD.,Qingdao 266520,China)
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| Abstract: |
| Reactive plasma spraying of Ti-Al mechanically milled powders on Q235steel surface was performed to prepare composite coating of Ti-Al intermetallic compounds and to study its properties.The compositions and microstructure of the coatings were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM) respectively,the bond strength,micro-hardness and corrosion resistance were also tested.The results show that the coatings consist of Al3Ti,TiN,Al2O3,a little TiAl and Ti3Al,residual Al and Ti.Even though mechanical milling can promote the reactions in the spraying,Al and Ti have not reacted completely during spraying,and they are easy to be oxidized and nitrified while being sprayed in air.Insert mechanical bonding is formed between the coating and the matrix.The average bond strength is 30.24MPa,the average micro-hardness is 206.1HV,and the corrosion resistance of the coatings is superior to that of the substrate.As a whole,the longer milling time,the higher spraying current,the longer spraying distance,and the lower gas flow rate,bring about the more thorough reactions in the spraying,the more uniform and compact microstructure of the coatings,and the higher bond strength,micro-hardness,and corrosion resistance of the coatings. |
| Key words: reactive plasma spraying mechanical milling Ti-Al intermetallic compounds composite coating |
