Properties of WC-8Co hardmetals with plate-like WC grains prepared by plasma-assisted milling

标题

Properties of WC-8Co hardmetals with plate-like WC grains prepared by plasma-assisted milling

作者

作者:Wang, W (Wang, Wei)^[1,2 ]; Lu, ZC (Lu, Zhong-Chen)^[1,2 ]; Chen, ZH (Chen, Zhi-Hong)^[1,2 ]; Zeng, MQ (Zeng, Mei-Qin)^[1,2 ]; Wang, H (Wang, Hui)^[1,2 ]; Zhu, M (Zhu, Min)^[1,2 ]

期刊信息

摘要

WC-8Co hardmetals with different proportions of prismatic WC grains and plate-like WC grains were directly produced through sintering the W-C-8Co elemental powder mixture which was fabricated by dielectric barrier discharge plasma (DBDP)-assisted milling. The morphology of prepared WC-8Co hardmetals, geometry and the preferential orientation of plate-like WC were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The results demonstrate that the microstructure and mechanical properties of the sintered hardmetals are related to the morphology of W grain which is dependent on DBDP-milling time. The DBDP for 1 h (DBDP-1 h)-milled W-C-Co powder contains granular W particles that tend to form prismatic WC grains, while the DBDP for 3 h (DBDP-3 h)-milled powder contains lamellar W particles that generate plate-like WC grains. By adjusting the weight ratio of DBDP-1 h powder and DBDP-3 h powder in W-C-8Co mixture, the proportion of plate-like WC in the hardmetals can be controlled, and relatively high transverse rupture strength (TRS) is obtained as the proportion of plate-like WC grain in the hardmetals is about 35 % in present experimental condition.

The DBDP-1 h-milled W-C-8Co powder (Sample A) contains granular W particles that tend to form prismatic WC grains, while the DBDP-3 h-milled powder (Sample B) contains lamellar W particles that generate plate-like WC grains. When the weight ratio of Samples A to B powder is 1:1, Sample A1B1 has relatively high transverse rupture strength (TRS) along both Sections V and P, with proportion of plate-like WC grain of similar to 35 %.

关键词

作者关键词:Plate-like WC; WC-Co hardmetal; Ball milling; Plasma

作者信息

作者信息

通讯作者地址:Wang, H (通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

	[ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510640, Guangdong, Peoples R China

电子邮件地址:mehwang@scut.edu.cn

出版商

NONFERROUS METALS SOC CHINA, 12B FUXIN RD, BEIJING 100814, PEOPLES R CHINA

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