Effects of Powder Type and Sintering Condition on the Properties of MIM Kovar
The low thermal expansion coefficient alloys such as Kovar(Fe29Ni17Co)have been widely produced using the wrought process.With the advantage of saving machining costs,MIM has been used to make Kovar parts with complicated shapes.This study compares the results of using different powders(prealloyed powder vs.mixed powder)and different sintering conditions(vacuum vs.hydrogen vs.dissociated ammonia).The products obtained have a density greater than 7.86 g/cm3,a hardness of HRB 65~75,and a thermal expansion coefficient of about 5.1 × 10-6/K.The effects of the powder type and processing variable on the microstructure and physical properties are discussed.The data show that MIM is a capable production process for making Kovar parts.
Kovar MIM CTE Sintering Conditions
Fan Yang-Liang Lin Yung-Kang Huang Huei-Ting Hwang Kuen-Shang
Department of Materials Science and Engineering,National Taiwan University,1 Roosevelt Road,Sec.4,Ta Taiwan Powder Technologies Co.,Ltd.,No.63,Jhonghua Rd.,Dasi Township,Taoyuan County,335,Chinese Taip
国际会议
北京
英文
720-724
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）