Phase-field simulation of liquid phase migration in the WC-Co system during liquid phase sintering

被引：7

作者：

Cheng, Kaiming ^{[1
]}

Zhang, Lijun ^{[1
]}

Schwarze, Christian ^{[2
]}

Steinbach, Ingo ^{[2
]}

Du, Yong ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Ruhr Univ Bochum, Interdisciplinary Ctr Adv Mat Simulat, Univ Str 150, Bochum, Germany

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2016年 / 107卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Liquid phase migration; Cemented carbide; Phase-field simulation; Liquid phase sintering; Solution precipitation; METAL MELTS; GRAIN-SIZE; ALLOYS; CONTIGUITY; COMPOSITE; CARBIDES;

D O I：

10.3139/146.111353

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Liquid phase sintering is a process for forming high performance, multiple-phase components from powders. The process includes very complex interactions between various mass transportation phenomena, among which the liquid phase migration represents an important one in the aspect of forming a gradient structure in cemented carbide. In the present work, phase-field simulation of the liquid phase migration phenomenon during liquid phase sintering is performed in the WC-Co based cemented carbide. The simulation results are analyzed and compared with the experimentally determined key factors of microstructural evolution, such as contiguity and liquid phase migration rate. The diffusion-controlled solution precipitation mechanism of the liquid phase migration process in the cemented carbide system is confirmed from the current simulation result, which provides deeper understanding of the micro structural evolution during the liquid phase migration process. These simulations can offer guidance in preventing the liquid phase migration process during liquid phase sintering of cellular cemented carbide.

引用

页码：309 / 314

页数：6

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