ZrO_2掺杂Mo基合金的制备及强化机理分析  

Preparation and Strengthening Mechanism Analysis of ZrO_2 Doped Molybdenum Alloy

作　　者：郭松亮[1] 张国赏[1,2] 魏世忠[1,2] 徐流杰[1,2] 崔超鹏[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]河南省耐磨材料工程技术研究中心,河南洛阳471003

出　　处：《稀有金属与硬质合金》2014年第5期48-50,共3页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金资助项目(50972039)

摘　　要：采用溶胶-凝胶法和两段氢还原工艺制得了ZrO2掺杂Mo粉,再通过粉末冶金法制得ZrO2掺杂Mo基合金,并通过SEM、TEM、XRD和EDS对ZrO2掺杂Mo粉和ZrO2掺杂Mo基合金进行表征,研究了ZrO2掺杂Mo基合金的强化机理。结果表明:所制备ZrO2掺杂Mo粉颗粒细小但大小不均,近乎圆球状,有轻微的团聚;所制备ZrO2掺杂Mo基合金中ZrO2以第二相的形式弥散分布于Mo基体晶界,通过Orowan强化、细晶强化提高了ZrO2掺杂Mo基合金的强度。ZrO2 doped molybdenum powders were prepared by sol-gel process and two stage hydrogen reduction,and then ZrO2 doped molybdenum alloy was prepared by powder metallurgy process. ZrO2 doped molybdenum powders and ZrO2 doped molybdenum alloy were characterized by SEM, TEM, XRD and EDS,and the strengthening mechanism of ZrO2 doped molybdenum alloy was investigated. The results show that the prepared ZrO2 doped molybdenum powders have fine but uneven grains and show sphere-like shape, with slight agglomeration phenomenon. The doped ZrO2 of the prepared molybdenum alloy disperses into the grain boundary of molybdenum substrate in the form of the second phase,and the strength of the molybdenum alloy is enhanced by Orowan strengthening and fine grain strengthening.

关 键 词：ZrO2掺杂Mo基合金 ZrO2掺杂Mo粉 Orowan强化 细晶强化 

分 类 号：TG146.412[一般工业技术—材料科学与工程]