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：7

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

页码：96 / 104

页数：9

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