Highly Transparent Y-a-sialon by Hot Pressing
The single-phase Y-a-sialon ceramics with highly optical transmittance were produced by hot pressing starting mixtures of Si3N4, A1N, A12O3 and Y2O3 at 1900 °C for 0.5 h in a nitrogen atmosphere. The resultant sialon shows very high optical transparency in the near infrared wavelength region, about 70％ for 0.8 mm thickness. In addition to highly transmittance, the Y-α-sialon also show high hardness (19 GPa) and well fracture toughness (4 MPam1/2), which attribute to the compound microstructure of uniform, equiaxed grain with a grain size of 2 urn and small aspect ration elongated α-sialon (<2) with a length no more than 5 μm. The high transparent was attribute to the uniform dense microstructure and pure singlephase α-sialon.
sialon optical transparency microstructure
Ying-Chun Shan Hui Ye Jiu-Jun Xu Jiang-Tao Li
Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026,China Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080,China
国际会议
大连
英文
599-602
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）