Heat conductivity, physico-mechanical properties and interrelations of them and structures of pressureless sintered composites produced of Si3N4-Al2O3-Y2O3(-ZrO2) nanodispersed system

被引：6
|
作者：
Kaidash, O. N. [1 ]
Fesenko, I. P. [1 ]
Kryl', Ya A. [2 ]
机构：
[1] Natl Acad Sci Ukraine, Bakul Inst Superhard Mat, UA-04074 Kiev, Ukraine
[2] Ivano Frankivsk Natl Univ Oil & Gas, UA-76019 Ivano Frankivsk, Ukraine
来源：
JOURNAL OF SUPERHARD MATERIALS | 2014年 / 36卷 / 02期
关键词：
silicon nitride; Si3N4; nanodispersed powder; pressureless sintering; bending strength; Vickers hardness; fracture toughness; heat conductivity; THERMAL-CONDUCTIVITY; SILICON-NITRIDE; BETA-SI3N4; SI3N4; MICROSTRUCTURE;
D O I：
10.3103/S106345761402004X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructures and properties of high-density materials produced by a pressureless sintering of nanodispersed powders of composition Si3N4-Al2O3-Y2O3(-ZrO2) have been studied. It has been found that these self-reinforced materials of low glass phase content exhibit the bending strength R (bm) = 720-850 MPa, Vickers hardness = 15.3-15.7 GPa, fracture toughness = 6.0-6.1 MPa center dot m(1/2), and heat conductivity = 15-25 W(m center dot K). The factors affecting physico-mechanical properties and heat conductivity of silicon-nitride materials have been discussed.
引用
收藏
页码：96 / 104
页数：9
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