A Transparent and Tough β-Si3N4 Ceramic with a Whiskery Microstructure

Autor:	Liu Cheng Gui, Peng Xi Li, Guo Jian Jiang, Hailong Zhang, Jun Li, Hong Qiang Wang
Rok vydání:	2015
Předmět:	Materials science Mechanical Engineering Nitride Intergranular corrosion Hot pressing Microstructure Fracture toughness Mechanics of Materials Indentation visual_art Transmittance visual_art.visual_art_medium General Materials Science Ceramic Composite material
Zdroj:	Key Engineering Materials. 655:1-5
ISSN:	1662-9795
DOI:	10.4028/www.scientific.net/kem.655.1
Popis:	The transparent β-Si3N4ceramic with a whisker-like microstructure was prepared by hot-pressing at 2000 °C for 26 h, with MgSiN2as an additive. The resultant material achieves the maximum transmittance of 70 % at the wavelength of about 2.5 μm and the transmittance value keeps higher than 60 % in the range of 700-4500 nm wavelength, which is attributed to the very small amount of the intergranular amorphous phase along with high density. The present transparent β-Si3N4ceramic exhibits an indentation fracture toughness of 7.2±0.3 MPa m1/2.
Databáze:	OpenAIRE
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