Fabrication and properties of CNT/Ni/Y/ZrB2 nanocomposites reinforced in situ

被引：4

作者：

Jin, Hua ^{[1
]}

Li, Zhewen ^{[1
]}

Wang, Liuwei ^{[1
]}

Zeng, QinXuan ^{[1
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin, Heilongjiang, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2018年 / 101卷 / 04期

基金：

中国国家自然科学基金;

关键词：

ceramic matrix composites; MECHANICAL-PROPERTIES; CARBON NANOTUBES; OXIDATION BEHAVIOR; PARTICLE-SIZE; MICROSTRUCTURE; CERAMICS; CNTS; DENSIFICATION; TEMPERATURE; COMPOSITES;

D O I：

10.1111/jace.15318

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Carbon nanotubes (CNTs) were synthesized in situ by chemical vapor deposition of methane over nano-ZrB2 matrix using Ni/Y catalysts. Well-grown CNTs with tangled and long bodies and mainly composed of well-crystallized graphite were obtained when the Ni content reaches 10 wt%. The CNT/ZrB2 nanocomposites obtained by spark plasma sintering at 1400 degrees C exhibited full density and optimal mechanical properties. The flexural strength and fracture toughness of the nanocomposites were 1184 +/- 52 MPa and 10.8 +/- 0.3 MPa.m(1/2), respectively. Results indicated that the dispersion of CNTs in situ can improve composite performance, rendering the mechanical properties of the CNT/ZrB2 nanocomposites synthesized in situ considerably superior to those of monolithic ZrB2 nanoceramics and CNT/ZrB2 nanocomposites synthesized using the traditional method. The toughening mechanisms included crack deflection, crack bridging, CNT debonding, pull-out, and fracture.

引用

页码：1747 / 1753

页数：7

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