您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 6    No. 4    December 1996

[PDF Download]    [Flash Online]

    

MICROSTRUCTURE AND THERMAL STRESS RELAXATION OF ZrO2-Ni FUNCTIONALLY GRADED MATERIAL
Zhu Jingchuan, Yin Zhongda, Lai Zhonghong, Li Jian

School of Materials Science and Engineering,Harbin Institute of Technology, Harbin 150001

Abstract:The microstructural characteristics and thermal stress relaxation of ZrO2-Ni functionally gradient materials (FGM) by hot-pressing were studied. The investigation by scanning and transmission electron microscopy as well as X-ray diffractometry demonstrated that the chemical composition and microstructure of ZrO2-Ni FGM distributed gradiently in stepwise way. The constituents, both zirconia and nickel, were continuous in microstructure everywhere, eliminating the macroscopic interface in traditional ceramics/metal joint. By means of finite element method, the thermal stress distribution in a layered ZrO2/Ni material (nonFGM) and that in a ZrO2-Ni FGM under an analogical condition with great temperature difference were preliminarily analyzed. It was shown that the thermal stress value in ZrO2-Ni FGM remarkably decreased and distributed more smoothly in comparison with that in ZrO2/Ni non-FGM. Obviously the ZrO2-Ni FGM has the function of thermal stress relaxation.

 

Key words: functionally graded material zirconia nickel microstructure thermal stress relaxation

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn