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

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

1.
东北大学材料与冶金学院, 沈阳 110004;
2.
沈阳工业大学材料科学与工程学院, 沈阳 110023;
3.
香港理工大学工业及系统工程学系, 香港九龙

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)

详细信息

通讯作者:
张松,博士,教授,主要从事材料表面工程及激光先进制造技术研究 E-mail:songzhang_sy@yahoo.com.cn

中图分类号: TB331
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- 被引次数: 0
出版历程
- 收稿日期: 2004-06-10
- 修回日期: 2004-10-22
- 刊出日期: 2005-06-15

IN-SI TU SYNTHESIZED TiN REINFORCED MMC COATINGBY LASER CLADDINGON NiTi ALLOY

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

摘要

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。
- NiTi 合金 /
- 激光合成 /
- 金属基复合材料 /
- 涂层
Abstract: Af ter being irradiated by a continuous wave Nd-YAG laser in N₂ environment, the Ti powders preplaced on the surface of NiTi subst rate t ransformed into a TiN reinforced metal mat rix composite (MMC) coating. Acompact 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 result s indicate that thereis a good metallurgical bonding between the hard MMC modified layer and the NiTi alloy subst rate. The mass f raction of Ni in the modified surface coating is very low. Microhardness and wear test result s show that the surfacehardness 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.
- NiTi alloy /
- laser synthesis /
- metal mat rix composites /
- coating