title: Co-electrodeposition of hard Ni-W/diamond nanocomposite coatings.
abstract: Electroplated hard chrome coating is widely used as a wear resistant coating to prolong the life of mechanical components. However, the electroplating process generates hexavalent chromium ion which is known carcinogen. Hence, there is a major effort throughout the electroplating industry to replace hard chrome coating. Composite coating has been identified as suitable materials for replacement of hard chrome coating, while deposition coating prepared using traditional co-deposition techniques have relatively low particles content, but the content of particles incorporated into a coating may fundamentally affect its properties. In the present work, Ni-W/diamond composite coatings were prepared by sediment co-electrodeposition from Ni-W plating bath, containing suspended diamond particles. This study indicates that higher diamond contents could be successfully co-deposited and uniformly distributed in the Ni-W alloy matrix. The maximum hardness of Ni-W/diamond composite coatings is found to be 2249 ± 23 Hv due to the highest diamond content of 64 wt.%. The hardness could be further enhanced up to 2647 ± 25 Hv with heat treatment at 873 K for 1 h in Ar gas, which is comparable to hard chrome coatings. Moreover, the addition of diamond particles could significantly enhance the wear resistance of the coatings.
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P.R. China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Jiaqian
authors.initials: J
authors.lastname: Qin
authors.affiliation: Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand.|International Graduate Program of Nanoscience &Technology, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Malay Kumar
authors.initials: MK
authors.lastname: Das
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P.R. China.
authors.forename: Ruru
authors.initials: R
authors.lastname: Hao
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P.R. China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhong
authors.affiliation: Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Adisak
authors.initials: A
authors.lastname: Thueploy
authors.affiliation: Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Sarintorn
authors.initials: S
authors.lastname: Limpanart
authors.affiliation: Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Yuttanant
authors.initials: Y
authors.lastname: Boonyongmaneerat
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P.R. China.
authors.forename: Mingzhen
authors.initials: M
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P.R. China.
authors.forename: Riping
authors.initials: R
authors.lastname: Liu