Fabricating Ultrathin Plate-Like WC Grains in WC-8Co Hardmetals by Increasing Discharge Intensity During Plasma-Assisted Ball Milling

时间:2020-09-11作者:浏览量:315


Fabricating Ultrathin Plate-Like WC Grains in WC-8Co Hardmetals by Increasing Discharge Intensity During Plasma-Assisted Ball Milling

作者:Zeng, MQ (Zeng, M. Q.)[ 1,3 ] ; Tu, JL (Tu, J. L.)[ 1,3 ] ; Zhu, M (Zhu, M.)[ 1,3 ] ; Wang, W (Wang, W.)[ 1,3 ] ; Liu, JW (Liu, J. W.)[ 1,3 ] ; Lu, ZC (Lu, Z. C.)[ 2,3 ]


METALS AND MATERIALS INTERNATIONAL


卷: 26  期: 9  页: 1373-1384

DOI: 10.1007/s12540-019-00389-x


出版年: SEP 2020


文献类型:Article


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摘要

The effects of plasma discharge intensity on the microstructure evolution of ball-milled tungsten (W)-carbon (C)-cobalt (Co) mixtures and the formation mechanism of ultrathin plate-like tungsten carbide (WC) grains prepared by ball milling with and without plasma discharge were investigated. It was found that increasing the plasma discharge intensity during ball milling obviously promoted the formation of a thin flake-like W phase because of the electroplasticity effect and simultaneously lowered the carburization temperature between W and C. A combination of high hardness and transverse rupture strength of 92.9 HRA and 3659 MPa, respectively, was obtained for the WC-8Co alloy fabricated by plasma milling at a gas pressure of 5 x 10(3) Pa with a dielectric barrier discharge layer thickness of 3 mm. These properties were mainly attributed to the markedly lowered activation energy of the WC phase and generation of highly oriented ultrathin plate-like WC grains by plasma milling. The combination of the flake-like structure of the plasma-milled W aggregate and high specific interfacial area and short diffusion distance of W/C were readily inherited by the ultrathin plate-like WC grains in the sintered WC-Co hardmetals. Graphic


关键词

作者关键词:Wc-Co hardmetals; Plate-like WC; Plasma milling; Discharge intensity


KeyWords Plus:DIELECTRIC BARRIER DISCHARGE; MECHANICAL-PROPERTIES; CO; MICROSTRUCTURES; NANOCOMPOSITE; HARDNESS; CARBIDE


作者信息

通讯作者地址:


South China University of Technology South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China.

Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

通讯作者地址: Lu, ZC (corresponding author)


显示更多South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China.

通讯作者地址: Lu, ZC (corresponding author)

      Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

地址:


显示更多[ 1 ]‎ South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China

显示更多[ 2 ]‎ South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China

      [ 3 ]‎ Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址:mezclu@scut.edu.cn


出版商

KOREAN INST METALS MATERIALS, KIM BLDG 6TH FLOOR, SEOCHO-DAERO 56 GIL 38, SEOCHO-GU, SEOUL 137-881, SOUTH KOREA


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Materials Science; Metallurgy & Metallurgical Engineering


Web of Science 类别:Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering


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