首页|Preparation and Properties of Translucent Y-α-Sialon Ceramics by Two-Steps Hot Pressing
Preparation and Properties of Translucent Y-α-Sialon Ceramics by Two-Steps Hot Pressing
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Trans Tech Publications Ltd
Yttrium-doped α-sialon ceramics with different compositions were prepared by two-steps hot pressing (first heating to 1750℃ holding for 60 min, then continue heating to 1900℃ holding for 60 min) at 25 MPa in nitrogen, their design compositions were Y_(0.4)Si_(9.8)Al_(2.2)O_(1.0)N_(15) (Y1210, m=1.2 and n=1.0), Y_(0.4)Si_(9.7)Al_(2.3)O_(1.1)N_(14.9)(Y1211, m=1.2 and n=1.1) and Y_(0.4)Si_(9.6)Al_(2.4)O_(1.2)N_(14.8) (Y1212, m=1.2 and n=1.2) respectively, and the effects of n value on phase composition, microstructure and optical property were approached. It is found that only α-sialon is detected in Y1210, however, there exist β-sialon besides of major phase a-sialon in Y1211 and Y1212. The density of sintered sample decreases with the increase of n value, higher n value contributes to elongated grain growth, and both the size and content of elongated grain increase with the increase of n value. The samples all show light transmission in the near infrared and infrared region, and their maximal optical transmittances decrease with the increase of n value. All those indicate that lower n value contribute to higher density, single a-sialon phase, smaller size and lower content of elongated grain, which is better for the preparation of higher optical transmittance Y-α-sialon.
α-sialontwo-steps hot pressingmicrostructureoptical property
Shan Yingchun、Xu Jiujun、Guan Chunlong、Li Jiangtao
展开 >
Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
School of Materials Science and Engineering, Henan University of Technology, Henan 450007, China
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China
NETL
NSTL
Trans Tech Publications Ltd
