One-step Sinter-HIP method for preparation of functionally graded cemented carbide with ultrafine grains. Issue 4 (March 2016)

• Record Type: Journal Article
• Authors: Zhou, Xiangkui; Xu, Zhifeng; Wang, Kai; Li, Guojian; Liu, Tie; Wang, Qiang; He, Jicheng
• Is Part Of: Ceramics international. Volume 42:Issue 4(2016)
• Page Start: 5362
• Page End: 5367
• Publication Date: 2016-03
• Subjects: A. Sintering -- B. Grain size -- C. Diffusion -- Functionally graded cemented carbide -- Sintering pressure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.12.069
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ultrafine crystalline functionally graded cemented carbides (FGCCs) with a surface zone enriched in binder phase were prepared by a one-step Sinter-HIP method. The influence of sintering pressure and cubic carbide composition on the formation of gradient layer was examined. The results show that the ultrafine FGCC with surface zone enriched in binder phase can be formed by the one-step Sinter-HIP method. The process of the gradient layer formation is accelerated under higher sintering pressure; the gradient layer thickness increases with the sintering pressure increasing. The gradient layer thickness is controlled by diffusion distance of cubic carbide formers, such as Ti, Ta and Nb. The addition of (Ta, Nb)C leads to decrease the thickness of gradient layer.