Design and development of SiC/(W,Ti)C gradient ceramic nozzle

被引：0
作者：
LiLi Liu
JianXin Deng
Yi Wang
LiNa Zhu
机构：
[1] Shandong University,Department of Mechanical Engineering
[2] Pingyuan University,School of Mechanical and Electrical
[3] Beijing Jiaotong University,School of Mechanical and Electrical
来源：
Science in China Series E: Technological Sciences | 2008年 / 51卷
关键词：
ceramic nozzle; erosion wear; function gradient material; stress; Finite element analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The idea of functionally gradient material (FGM) theory was used to design ceramic nozzle based on the erosion wear behaviors of the ceramic nozzles and the outstanding properties of FGM. The purpose is to reduce the tensile stress at the entry region of the nozzle during sand blasting processes. The design theory and methods of gradient ceramic nozzle were proposed. The physical, micromechanical, and composition distribution models of gradient ceramic nozzle were established. The optimum composition distribution of the gradient ceramic nozzle material was determined from the solution of the multi-objective optimization calculation by constructing the models of the composition distribution versus the structural integrity of the compact in fabricating process. Results showed that compressive residual stresses appeared at the entry area of the gradient ceramic nozzle. The optimized component distribution exponent p is 0.5. An SiC/(W,Ti)C gradient ceramic nozzle material was synthesized by hot-pressing according to the design result. Results showed that the surface Vickers hardness of the FGM-1 gradient ceramic nozzle materials was greatly improved in comparison with that of the other layers.
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页码：77 / 84
页数：7
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