The influence of in-situ formation of hibonite on the properties of zirconia toughened alumina (ZTA) composites

被引：54

作者：

Sktani, Zhwan Dilshad Ibrahim ^{[1
]}

Azhar, Ahmad Zahirani Ahmad ^{[2
]}

Ratnam, Mani Maran ^{[3
]}

Ahmad, Zainal Arifin ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Mat & Mineral Resources Engn, Struct Mat Niche Area, Nibong Tebal 14300, Penang, Malaysia

[2] Int Islamic Univ Malaysia, Fac Engn, Dept Mfg & Mat Engn, Gombak 50728, Selangor, Malaysia

[3] Univ Sains Malaysia, Sch Mech Engn, Nibong Tebal 14300, Penang, Malaysia

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 04期

关键词：

ZTA; Hibonite (CaAl12O19); In-situ formation; Fracture toughness; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; MICROSTRUCTURAL DEVELOPMENT; CERAMICS; STRONTIA; BEHAVIOR; SYSTEMS;

D O I：

10.1016/j.ceramint.2013.11.076

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：

This paper reports an investigation on the impact of in-situ formation of CaA112019 (hibonite) on the microstructure and mechanical properties of zirconia-toughened-alumina (ZTA). Various amounts of CaCO3 (0-13 wt%) were added to ZTA to form CaAl12O19. Samples were sintered at 800 C for 4 h to obtain CaO from decomposition of CaCO3, and then at 1600 degrees C for 4 h to produce elongated CaAl(12)O(19)grains. Analyses of samples were done using XRD and FESEM. The higher the amount of CaCO3 added, the higher the amounts of CaAl(12)O(19)and pores observed. The toughness value increased with the increase of CaAl12O19 for a critical range, and subsequently decreased; the reverse trend was observed for the hardness and density results. The sample with 0.5 wt% CaCO3 addition produced the highest toughness (6.3 MPa m(1/2)), reasonable hardness (1568.6 HV), density (4.11 g/cm(3)), and porosity (1.29%) values. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：6211 / 6217

页数：7

共 40 条

[1] R-curve behavior of in-situ-toughened Al2O3:CaAl12O19 ceramic composites [J].