微量ZrC对Mo-Ti-Zr合金显微组织与性能的影响  

Effects of trace ZrC on properties and microstructure of Mo-Ti-Zr alloys

作　　者：成会朝[1] 范景莲[1] 钱昭[1] 田家敏[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《中国科技论文》2013年第6期521-524,共4页China Sciencepaper

基　　金：国家杰出青年科学基金资助项目(50925416);高等学校博士学科点专项科研基金资助项目(20090162110032)

摘　　要：采用粉末冶金方法制备出Mo-Ti-Zr-ZrC合金,研究了微量ZrC对Mo-Ti-Zr合金性能和显微组织的影响。结果表明,微量ZrC的添加,使得Mo-Ti-Zr合金的相对密度和抗拉强度均得到提高,并且在ZrC添加量为0.4%(质量分数)时,合金强度达到最高,较Mo-Ti-Zr合金提高了35.1%。添加的ZrC颗粒可以与坯体内的氧发生反应,生成含氧的第二相颗粒,起到减少孔隙、提高强度的效果,并且弥散分布的第二相颗粒对合金具有弥散强化效果,从而使合金强度显著提高。The effects of adding trace ZrC on the mechanical properties and microstructure of Mo-TbZr-ZrC alloys fabricated by powder metallurgy process were studied. The results indicated that the relative density and tensile strength of Mo-Ti-Zr-ZrC alloy at room temperature were effectively enhanced by adding trace ZrC. And its tensile strength reaches its highest level, which is 35.1~~ higher than the Mo-Ti-Zr alloy, when the ZrC addition is 0. 4~ （mass fraction）. The added ZrC particles reacted with oxygen in the green body and generated second-phase particles that contain oxygen, which can eliminate holes and improve strength. In addition, the dispersive second-phase particles can play a role of strengthening dispersion, which makes the strength of the alloys significantly improved.

关 键 词：Mo-Ti-Zr-ZrC合金 抗拉强度 第二相颗粒 弥散强化 

分 类 号：TG146.412[一般工业技术—材料科学与工程]