A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SILICON NITRIDE CERAMIC SINTERED BODY AND PREPARATION METHOD THEREOF
Disclosed are a silicon nitride ceramic sintered body and a-preparation method thereof. The silicon nitride ceramic sintered body includes a sintered bulk and a hard surface layer having a thickness of 10-1000 μm, formed on a surface of the sintered bulk, wherein the sintered bulk comprises a first silicon nitride crystalline phase and a first grain boundary phase; the hard surface layer comprises a second silicon nitride crystalline phase and a second grain boundary phase; the first grain boundary phase comprises a metal tungsten phase being tungsten elementary substance and/or a tungsten alloy; the second grain boundary phase comprises tungsten carbide particles; tungsten element in the metal tungsten phase accounts for 80-100 wt % of total tungsten element in the first grain boundary phase; and tungsten element in the tungsten carbide particles accounts for 60-100 wt % of total tungsten element in the second grain boundary phase.
SILICON NITRIDE CERAMIC SINTERED BODY AND PREPARATION METHOD THEREOF
Disclosed are a silicon nitride ceramic sintered body and a-preparation method thereof. The silicon nitride ceramic sintered body includes a sintered bulk and a hard surface layer having a thickness of 10-1000 μm, formed on a surface of the sintered bulk, wherein the sintered bulk comprises a first silicon nitride crystalline phase and a first grain boundary phase; the hard surface layer comprises a second silicon nitride crystalline phase and a second grain boundary phase; the first grain boundary phase comprises a metal tungsten phase being tungsten elementary substance and/or a tungsten alloy; the second grain boundary phase comprises tungsten carbide particles; tungsten element in the metal tungsten phase accounts for 80-100 wt % of total tungsten element in the first grain boundary phase; and tungsten element in the tungsten carbide particles accounts for 60-100 wt % of total tungsten element in the second grain boundary phase.
SILICON NITRIDE CERAMIC SINTERED BODY AND PREPARATION METHOD THEREOF
QIAO ZHUHUI (author) / WANG LUJIE (author) / LI TONGYANG (author) / WANG ZIYUE (author) / YU YUAN (author) / TANG HUAGUO (author)
2024-02-08
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Silicon nitride ceramic sintered body and preparation method thereof
| European Patent Office | 2024
Silicon nitride ceramic sintered body and preparation method thereof
| European Patent Office | 2023
Preparation method of porous silicon nitride ceramic sintered body
| European Patent Office | 2023
CERAMIC SINTERED BODY AND MANUFACTURING METHOD THEREOF, AND SILICON NITRIDE POWDER
| European Patent Office | 2022