Synthesis and Densification of Monolithic Zirconium Carbide by Reactive Hot Pressing

被引：69

作者：

Nachiappan, Chidambaram ^{[1
]}

Rangaraj, Lingappa ^{[2
]}

Divakar, Canchi ^{[2
]}

Jayaram, Vikram ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India

[2] Natl Aerosp Labs CSIR, Div Mat Sci, Bangalore 560017, Karnataka, India

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 05期

关键词：

PHASE-STABILITY; ZRC; CARBON; COMPOSITES; POWDERS; SYSTEM;

D O I：

10.1111/j.1551-2916.2010.03608.x

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：

Synthesis and densification of monolithic zirconium carbide (ZrC) has been carried out by reactive hot pressing of zirconium (Zr) and graphite (C) powders in the molar ratios 1:1, 1.25:1, 1.5:1, and 2:1 at 40 MPa, 1200 degrees-1600 degrees C. Monolithic ZrC could be synthesized with a C/Zr ratio similar to 0.5-1.0 and the post heat-treated samples have the lattice parameter in the range 4.665 to 4.698 A. Densification improves with an increasing deviation from the stoichiometry. Fine-grained (similar to 1 mu m) and nearly fully dense material (99% RD) could be obtained at a temperature as low as 1200 degrees C with C/Zr similar to 0.67. Microstructural and XRD observations suggest that densification occurred at low temperatures with nonstoichiometric Zr-C powder mixtures.

引用

页码：1341 / 1346

页数：6

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