A Novel Approach to the Rapid in situ Synthesis of Tungsten Carbide Nanopowder by Plasma Milling and Carbothermal Reduction
作者:
Zeng, MQ (Zeng, Meiqin) [1] , [2] ; Pan, YT (Pan, Youtao) [1] , [2] ; Liu, WF (Liu, Weifeng) [1] , [2] ; Cui, J (Cui, Jie) [1] , [2] ; Lu, ZC (Lu, Zhongchen) [2] , [3] ; Zhu, M (Zhu, Min) [1] , [2]
ADVANCED ENGINEERING MATERIALS
文献号2200175
DOI10.1002/adem.202200175
在线发表JUN 2022
已索引2022-06-18
文献类型Article; Early Access
摘要
This work prepares nanocrystalline tungsten carbide (WC) powder using conventional ball milling or plasma milling (P-milling) to process tungsten trioxide (WO3)-carbon (C) mixtures, with subsequent carbothermal reduction. The aim is to assess the effects of a discharge plasma on the microstructure of these materials. The results indicates that WC powders with particle sizes of less than 100 nm could be fabricated through heating at a relatively low temperature of 1150 degrees C for 1 h under vacuum after P-milling. This process is found to allow a lower processing temperature and provided more complete carburization in comparison with conventional ball milling. P-milling is determined to produce more loosely adhering WO3 nanoparticles and a higher surface area, resulting in more reactive sites and a larger contact area between WO3 nanoparticles and C atoms. This technique simultaneously generates more oxygen vacancies and defects on the surfaces of the WO3 and C, respectively, based on the use of a plasma discharge. It is evident that this new technology permits nanocrystalline WC to be readily obtained from WO3 and C in a reduced time span and at a lower cost and greater efficiency. This technique could also be used to fabricate WC nanopowders on an industrial scale.
关键词
作者关键词plasma millingtungsten carbideWC-Co hard metalWO3-C precursor
Keywords PlusCO COMPOSITE POWDERWCULTRAFINEFABRICATIONHARDMETALSROUTESTEPNANOWO3
作者信息
通讯作者地址
Lu, Zhongchen
(通讯作者)
Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510640, Peoples R China
通讯作者地址
Lu, Zhongchen
(通讯作者)
South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China
地址
1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China
2 Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510640, Peoples R China
3 South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China
电子邮件地址mezclu@scut.edu.cn
类别/分类
研究方向Materials Science