Structure and Properties of ZrC/C Heteromodulus High-Temperature Composites

被引：2

作者：

Mirovoy, Yu. A. ^{[1
]}

Burlachenko, A. G. ^{[1
]}

Buyakova, S. P. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Inst Strength Phys & Mat Sci, Tomsk, Russia

来源：

RUSSIAN PHYSICS JOURNAL | 2020年 / 63卷 / 05期

关键词：

ceramic composites; carbides; toughness; hardness; elasticity; heterostructures; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; HETERO-MODULUS; MICROSTRUCTURE; DENSIFICATION; NANOCOMPOSITE; INTERFACE;

D O I：

10.1007/s11182-020-02094-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of free carbon on densification and mechanical properties of ZrC/C heteromodulus composites is studied. It is shown that free carbon in the amount of up to 3 vol % decreases residual porosity in the heteromodulus composites, while the content of free carbon of more than 3 vol % increases it. Furthermore, increased carbon content in ZrC/C composites improves the sintered material toughness. In particular, for pure ZrC K-Ic= 4.3 MPa center dot m(1/2), and for the composite with 3 vol.% carbon K-Ic= 7 MPa center dot m(1/2). The lowest fracture toughness is demonstrated by the composite with 15 vol.% carbon K-Ic= 5.3 MPa center dot m(1/2).

引用

页码：752 / 758

页数：7

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