Fabrication and mechanical properties of β-sialon-Fe x Si y -CNTs composites

被引：7

作者：

Sun, Xiaolin ^{[1
,2
]}

Sun, Kangning ^{[1
,2
]}

Sun, Xiaoning ^{[1
,2
]}

Xing, Lijuan ^{[1
,2
]}

Liu, Yi ^{[1
,2
]}

Qian, Lei ^{[1
,2
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

[2] Shandong Univ, Engn Ceram Key Lab Shandong Prov, Jinan 250061, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 19期

关键词：

CERAMIC-MATRIX COMPOSITES; AL-O-N; SILICON-NITRIDE; CARBON NANOTUBES; COMBUSTION SYNTHESIS; FRACTURE-TOUGHNESS; NANOCOMPOSITES; GRAPHENE; AL2O3;

D O I：

10.1007/s10853-013-7467-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Silicon nitride composites were fabricated by adding Fe3Al and carbon nanotubes and hot-pressing at a low sintering temperature of 1600 A degrees C. The resulted composites were characterized by X-ray diffraction, Fourier-transform infrared spectrum, and field emission scanning electron microscopy. It was found that the Fe3Al could react with Si3N4 to form the series of compound of Fe (x) Si (y) , and CNTs could keep chemical stability in the system. Mechanical properties of the composites were also investigated. For Fe3Al as the additive, the relative density could reach to 93.6 % with the maximum hardness of 15.7 GPa. When the Fe3Al and CNTs were added into matrix simultaneously, the relative density reached to 92.6 %, and the maximum fracture toughness was 6.7 MPa m(1/2). Finally, the toughening mechanism of Fe3Al and CNTs in sialon composites, containing crack deflection and bridging, and nanotubes pullout and bridging, were also discussed.

引用

页码：6673 / 6681

页数：9

共 40 条

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