弥散强化Pt-10Rh合金高温微观组织结构研究

Feng LI,Xiaoliang YANG,Huiyi TANG,Baoan WU,Xiaoli CHENG,Weifan LUO, Weijian WAN, Mingze XI, Guisheng WANG

Journal of Functional Materials（2019）

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Abstract

用金相显微镜、扫描电镜观测普通Pt-10Rh合金和弥散强化Pt-10Rh合金的微观组织结构,结果表明,普通Pt-10Rh合金在高温下晶粒长大趋势明显,且高温持久性低,而弥散强化Pt-10Rh合金中有强化颗粒氧化锆的存在,能减少晶界缺陷,提高晶界结合力,降低晶界的扩散速度,减缓位错攀移,有效阻止晶粒长大和晶界的滑移,从而提高材料的强度和使用寿命.

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