Effect of powder morphology on sintering kinetics, microstructure and mechanical properties of monazite ceramics

被引：29

作者：

Arinicheva, Y. ^{[1
]}

Clavier, N. ^{[2
]}

Neumeier, S. ^{[1
]}

Podor, R. ^{[2
]}

Bukaemskiy, A. ^{[1
]}

Klinkenberg, M. ^{[1
]}

Roth, G. ^{[3
]}

Dacheux, N. ^{[2
]}

Bosbach, D. ^{[1
]}

机构：

[1] Forschungszentrum Julich GmbH, Inst Energy & Climate Res Nucl Waste Management &, D-52425 Julich, Germany

[2] Univ Montpellier, CNRS, UMR 5257, ICSM,CEA,ENSCM, Site Marcoule,Bat 426,BP17171, F-30207 Bagnols Sur Ceze, France

[3] Rhein Westfal TH Aachen, Inst Crystallog, D-52056 Aachen, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 01期

关键词：

Monazite; Sintering kinetics; HT-ESEM; Hot pressing; Texture effects; Microhardness; SITU HT-ESEM; SOLID-STATE SYNTHESIS; GRAIN-GROWTH; LNPO(4) LN; LA; DENSIFICATION; PHOSPHATE; CE; RHABDOPHANE; REPO4;

D O I：

10.1016/j.jeurceramsoc.2017.08.008

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 work focuses on the effect of precursor morphology on the microstructural evolution of monazite-type lanthanum-europium phosphate ceramics during sintering, including grain growth rate, as well as correlations between microstructure, texture effects and their mechanical properties. Sintering kinetics of La0.5Eu0.5PO4 powders with two different grain morphologies (needle-shaped and spherical) was studied by an in situ HT-ESEM method at 1340 degrees C. La0.5Eu0.5PO4 pellets with high density (99% of the theoretical density) were obtained for both precursor powders by hot pressing. Analysis of XRD data collected for the hot pressed pellets obtained from needle-shaped precursors revealed preferential orientation of the grains towards the (100) direction. Mechanical properties of the hot pressed pellets were studied by the Vickers indentation method. The dependence of microhardness and fracture toughness on microstructure and texture was investigated.

引用

页码：227 / 234

页数：8

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