Fabrication and mechanical properties of SiO2-Al2O3-BNNPs and SiO2-Al2O3-BNNTs composites

被引：17

作者：

Du, Ming ^{[1
,2
]}

Bi, Jian-Qiang ^{[1
,2
,3
,4
]}

Wang, Wei-Li ^{[1
,2
]}

Sun, Xiao-Lin ^{[1
,2
]}

Long, Na-Na ^{[1
,2
]}

Bai, Yu-Jun ^{[1
]}

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

[3] Univ Georgia, Dept Phys & Astron, Fac Engn, Athens, GA 30602 USA

[4] Univ Georgia, Nanosci & Engn Ctr, Athens, GA 30602 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 530卷

基金：

中国国家自然科学基金;

关键词：

SiO2; Al2O3; BNNTs; BNNPs; Mechanical properties; Microstructure; BORON-NITRIDE NANOTUBES; CARBON NANOTUBES; ALUMINA MATRIX; CERAMICS; MICROSTRUCTURE; REINFORCEMENT;

D O I：

10.1016/j.msea.2011.10.008

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hexagonal BN nanoparticles (BNNPs) and boron nitride nanotubes (BNNTs) were determined to fabricate the composites of 75 wt% SiO2-10 wt% Al2O3-5 wt% BNNPs (S-A-BNNPs) and 75 wt% SiO2-10 wt% Al2O3-5 wt% BNNTs (S-A-BNNTs) via hot pressing. Comprehensive investigations on mechanical properties of the two composites were conducted, respectively. The two composites had high flexural strength and fracture toughness. The flexural strength of S-A-BNNPs and S-A-BNNTs composites are approximately 216.1% and 279.1% higher than that of the unreinforced SiO2, and the fracture toughness increases from 0.58 MPa m(1/2) to 1.23 MPa m(1/2), and to 1.39 MPa m(1/2), respectively. Based upon detailed examination on microstructures, the strengthening and toughening mechanism was discussed. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

引用

页码：669 / 674

页数：6

共 30 条

[1] Multi-walled carbon nanotubes reinforced Al2O3 nanocomposites: Mechanical properties and interfacial investigations [J].