Mo含量对牙科用Ti-Mo合金显微组织及性能的影响  

The influence of Mo on the microstructure and properties of Ti-Mo alloys

作　　者：徐丽娟[1] 肖树龙[1] 陈玉勇[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《功能材料》2007年第A05期1789-1792,共4页Journal of Functional Materials

基　　金：黑龙江省自然科学基金资助项目（ZJY0605-02）

摘　　要：采用LZ5型离心铸钛机制备了4种Ti-Mo（5％、10％、15％和20％（质量分数）Mo）合金，研究了其显微组织和力学性能，并对其在Hank’S溶液和0．9％NaCl溶液中的耐蚀性进行了研究。研究结果表明：Ti-5Mo合金由等轴的α相组成，Ti-10Mo合金由等轴的β相和针状的α相组成，Ti-15Mo和Ti-20Mo合金由单一的等轴β相组成。力学性能测试结果表明，随着Mo含量的增加，Ti-Mo合金的压缩强度降低，塑性增强。耐蚀性研究结果表明，Hank＇s溶液中Ti-10Mo合金的自腐蚀电位较高，且易钝化；0．9％NaCl溶液中，Ti-5Mo合金的自腐蚀电位较高。Ti-20Mo合金易钝化且钝化区间较宽，两种腐蚀介质中Ti-15Mo合金的钝化膜较稳定。In present paper, a series of binary Ti-Mo alloys with molybdenum contents 5wt%, 10wt%, 15wt% and 20wt% were prepared using LZ5 type centrifugal casting machine. The microstructure, mechanical properties and corrosion resistance in Hank＇s solution and 0.9%NaCl solution of Ti-Mo alloys were investigated. Experimental results indicated that Ti-5Mo alloy was composed of equiaxed α phase. Ti-10Mo alloy was composed of equiaxed β phase and acicular α phase. Ti-15Mo and Ti-20Mo were composed of only equiaxed β phase. The mechanical properties investigations have shown that Ti-Mo alloys reduced compression strength, but increased plasticity with the increase of Mo content. Corrosion tests reveatled that Ti-10Mo alloy showed higher self-corrosion potential and was easy to passivate in Hank＇s solution. Ti-5Mo alloy showed higher self-corrosion potential. Ti-20Mo alloy was easy to passivate with a wider passivation range in 0.9%NaCl solution. The passivation film of Ti-15Mo alloy was stabler in Hank＇s solution and 0.9%NaCl solution.

关 键 词：TI-MO合金 显微组织 力学性能 耐蚀性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]