微波烧结温度和保温时间对SiN/n-SiC陶瓷力学性能及微观结构的影响

Effects of Microwave Sintering Temperature and Holding Time on Mechanical Properties and Microstructure of SiN/n-SiC ceramics.

作者信息

Qiao Li, Wang Zhenhua, Lu Taiyi, Yuan Juntang

机构信息

School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China.

Collaborative Innovation Center of High-End Equipment Manufacturing Technology (Nanjing University of Science & Technology), Ministry of Industry and Information Technology, Nanjing 210094, China.

出版信息

Materials (Basel). 2019 Nov 21;12(23):3837. doi: 10.3390/ma12233837.

DOI:10.3390/ma12233837

PMID:31766462

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6926736/

Abstract

The n-SiC (nanometer SiC) is added to be the additive in order to improve the mechanical performance of SiN ceramics. A microwave sintered the ceramics at different temperature and holding times. The results shows that the SiN/n-SiC ceramics (85 wt% SiN + 5 wt% n-SiC + 5 wt% AlO + 5 wt% YO) have the best mechanical properties at 1600 °C, which is beneficial to the densification and β-SiN phase formation for 10 min: the density, hardness, and fracture toughness were 97.1%, 14.44 GPa, and 7.77 MPa·m, which increased by 2.8%, 7.0%, and 13.1%, respectively, when compared with the ceramics (90 wt% SiN + 5 wt% AlO + 5 wt% YO).

摘要

添加纳米碳化硅（n-SiC）作为添加剂以提高氮化硅陶瓷的机械性能。采用微波在不同温度和保温时间下烧结陶瓷。结果表明，SiN/n-SiC陶瓷（85 wt% SiN + 5 wt% n-SiC + 5 wt% AlO + 5 wt% YO）在1600℃下保温10分钟时具有最佳机械性能，这有利于致密化和β-SiN相形成：密度、硬度和断裂韧性分别为97.1%、14.44 GPa和7.77 MPa·m，与陶瓷（90 wt% SiN + 5 wt% AlO + 5 wt% YO）相比，分别提高了2.8%、7.0%和13.1%。