摘要
采用快速热压烧结技术成功制备出Cu-Al_(2)O_(3)/20W3SiC复合材料,对复合材料的导电率、致密度以及硬度进行了测试,实验结果表明:材料结构致密、性能良好,内氧化生成的Al_(2)O_(3)颗粒弥散分布在铜基体中,各种强化相的协同强化作用对材料的增益效果明显。利用Gleeble-1500D热模拟试验机研究了材料的热变形行为,依据真应力-真应变曲线构建了材料的本构方程和热加工图,在变形量为0.3~0.6时,材料的最佳变形温度为740~950℃,最佳应变速率为0.03~0.273 s^(-1)。
Cu-Al_(2)O_(3)/20W3SiC composite was successfully prepared by fast hot-press sintering technique,and the electrical conductivity,relative density,and hardness of the composite were measured.The experiment results show that the material was characterized and analyzed.The material has a dense structure and good performance,the Al_(2)O_(3) particles generated by internal oxidation are uniformly distributed in the copper matrix,and the synergistic reinforcing effect of various reinforcing phases is obvious for the material gain.The thermal deformation behavior of the material was studied by Gleeble-1500D thermal simulation testing machine,and the constitutive equation and hot processing map of the material were established according to the true stress-true strain curve.The optimal deformation temperature and strain rate of the material were 740~950℃ and 0.03~0.273 s^(-1) when the deformation amountwas 0.3~0.6.
作者
黄永峰
郑先华
马紫鹏
徐永贵
李恒
景柯
周孟
HUANG Yongfeng;ZHENG Xianhua;MA Zipeng;XU Yonggui;LI Heng;JING Ke;ZHOU Meng(Henan Science and Technology Exchange Center,Zhengzhou 450008,Henan,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,Henan,China)
出处
《金属功能材料》
CAS
2023年第6期33-38,共6页
Metallic Functional Materials
基金
河南省自然科学基金(232300420089)
中国博士后科学基金(2023TQ0107)。
关键词
显微组织
真应力-真应变曲线
本构方程
热加工图
microstructure
true stress-true strain curve
constitutive equation
hot processing map
