Process optimization and coating properties of aluminum coating prepared by supersonic plasma powder feeding based on response surface. Issue 5 (March 2019)

• Record Type: Journal Article
• Authors: Liu, Ming; Jin, Ziang; Ma, Guozheng; Zhu, Lina; Kang, Jiajie; Wang, Haidou; Zhang, Wei
• Is Part Of: Journal of physics. Volume 1176:Issue 5(2019)
• Publication Date: 2019-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1176/5/052021
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: This paper adopts High Efficiency Supersonic Plasma Spraying (HEPJet) to produce aluminum coating under the condition of large powder delivery. Based on the Box-Behnken-Design (BBD) design in Response Surface Method (RSM), the interaction of Ar flow, power and spraying distance with the deposition efficiency and microhardness of aluminum coating was analyzed, and the spraying parameters of aluminum coating prepared by supersonic plasma powder feeding were optimized. The coating performance was analyzed by means of electron microscopy (SEM) and X-ray diffraction (XRD). The results show that the established quadratic equation model is reliable and the influence of spraying distance coating on deposition efficiency and microhardness is greatest. The parameters of spraying with large powder delivery were as follows: argon 200 L/min, power 50 kW, spraying distance 40 mm, and powder delivery amount 150 g/min. Moreover, the aluminum coating prepared by HEPJet has poor density, large porosity and severe oxidation, which provides reference value for the subsequent research on the preparation of aluminum coating by HEPJet.