Synthesis, sintering and characterisation of TaON materials

被引：21

作者：

Matizamhuka, W. R. ^{[1
]}

Sigalas, I. ^{[1
]}

Herrmann, M. ^{[2
]}

机构：

[1] Univ Witwatersrand, Sch Chem & Met Engn, ZA-2050 Wits, Johannesburg, South Africa

[2] IKTS Fraunhofer Inst Ceram Technol & Syst, D-01277 Dresden, Germany

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

sol-gel processes; sintering; hardness; cutting tools;

D O I：

10.1016/j.ceramint.2007.04.005

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：

Theoretical investigations predict that TaON is likely to possess a relatively high hardness, thus making it a candidate for application as an abrasive or cutting tool material [J.E. Lowther, Theoretical Study of potential high pressure phases of TaON and quaternary ZrTaO3N, in press]. TaON powder was produced by nitridation of amorphousTa(2)O(5) powder in flowing ammonia in the 700-900 degrees C temperature range and an ammonia flow rate range of 40-50 cm(3)/rnin. The resulting powders were characterised in oxidation resistance by thermo-gravimetric analysis (TGA), phase purity by X-ray diffraction (XRD) and surface area by the BET method. The materials were densified under pressure using a belt type high pressure apparatus at 3-5.5 GPa in the temperature range of 920-1200 degrees C. The sintered samples were characterised in phase purity, Vickers macro-hardness and fracture toughness. (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1481 / 1486

页数：6

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