Synthesis and phase separation of (Ti,Zr)C

被引：54

作者：

Borgh, I. ^{[1
]}

Hedstrom, P. ^{[1
]}

Blomqvist, A. ^{[2
]}

Agren, J. ^{[1
]}

Odqvist, J. ^{[1
]}

机构：

[1] KTH Royal Inst Technol, SE-10044 Stockholm, Sweden

[2] Sandvik Coromant R&D, SE-12680 Stockholm, Sweden

来源：

ACTA MATERIALIA | 2014年 / 66卷

关键词：

Carbides; X-ray diffraction; Electron microscopy; Phase separation; First-principles calculations; SPINODAL DECOMPOSITION; AB-INITIO; CARBIDES; TOOLS;

D O I：

10.1016/j.actamat.2013.11.074

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synthesis and phase separation of (Ti,Zr)C were investigated in the present work. The (Ti,Zr)C phase was synthesized at 2200 C and subsequently aged at 1300 C for different times. The microstructure was investigated using X-ray diffraction and electron microscopy, and supplemented by first-principles calculations. The (Ti,Zr)C phase separates into a lamellar nanostructure with alternating Ti- and Zr-rich face-centered cubic domains as well as non-stoichiometric TiC and ZrC. The lamellar structure is a consequence of phase separation within the miscibility gap that is directionally constrained by high coherency stresses, as indicated by the first-principles calculations. Moreover, the increased hardness due to the phase separation suggests that the mixed carbide could be used as a strengthening constituent in, for example, cemented carbides. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：209 / 218

页数：10

共 26 条

[21] First-principles calculations of the ferroelastic transition between rutile-type and CaCl2-type SiO2 at high pressures [J].