| NiTi 合金表面激光原位反应合成TiN增强金属基复合材料涂层 |
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| 引用本文： | 张春华,张松,文效忠,刘常升,才庆魁.NiTi 合金表面激光原位反应合成TiN增强金属基复合材料涂层[J].复合材料学报,2005,22(3):116-120. |
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| 作者姓名： | 张春华 张松 文效忠 刘常升 才庆魁 |
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| 作者单位： | 1.东北大学材料与冶金学院, 沈阳 110004; |
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| 基金项目： | 国家高技术研究发展计划(863计划)(2002AA305203)，辽宁省科学技术基金(20031024)，辽宁省教育厅科学研究计划(2004D11) |
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| 摘 要： | 采用连续高功率固体Nd-YA G激光辐照, 使预置于NiTi 合金表面的Ti 粉在N2 环境中形成TiN 增强Ti 基复合材料涂层。选择适当的激光辐照工艺参数, 获得致密的TiN 增强金属基复合材料激光改性层。SEM 观察及EDAX 成分分析结果表明, TiN/ Ti 金属基复合材料表面改性层与基体NiTi 合金存在良好的冶金结合, 界面处成分均匀过渡, 表面Ni 含量极低。显微硬度测试及磨损实验表明, TiN/ Ti 金属基复合材料改性层显著提高了NiTi 合金的表面硬度和耐磨性, 激光表面改性层可有效地改善NiTi 合金作为生物医学材料使用的表面成分和性能。
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| 关 键 词： | NiTi 合金 激光合成 金属基复合材料 涂层 |
| 文章编号： | 1000-3851(2005)03-0116-05 |
| 收稿时间： | 2004-06-10 |
| 修稿时间： | 2004-10-22 |
IN-SI TU SYNTHESIZED TiN REINFORCED MMC COATINGBY LASER CLADDINGON NiTi ALLOY |
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| Zhang Chunhua,ZHANG Song,WEN Xiaozhong,Liu Changsheng,CAI Qingkui.IN-SI TU SYNTHESIZED TiN REINFORCED MMC COATINGBY LASER CLADDINGON NiTi ALLOY[J].Acta Materiae Compositae Sinica,2005,22(3):116-120. |
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| Authors: | Zhang Chunhua ZHANG Song WEN Xiaozhong Liu Changsheng CAI Qingkui |
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| Affiliation: | 1.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;2.College of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China;3.Department of Indust rial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | After being irradiated by a continuous wave Nd-YAG laser in N_2 environment, the Ti powders preplaced on the surface of NiTi substrate transformed into a TiN reinforced metal matrix composite(MMC) coating. A compact laser modified surface coating reinforced with fine TiN can be achieved with optimum process parameters. The amount of TiN reinforcement gradually decreases across the coating. SEM and EDAX results indicate that there is a good metallurgical bonding between the hard MMC modified layer and the NiTi alloy substrate. The mass fraction of Ni in the modified surface coating is very low. Microhardness and wear test results show that the surface hardness and wear resistance are significantly enhanced. Laser surface modification can effectively improve the surface composition and performance of NiTi alloy as an implant biomedical material. |
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| Keywords: | NiTi alloy laser synthesis metal matrix composites coating |
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