Interfacial bonding of low-pressure plasma-sprayed Fe-based amorphous coating on 8090 Al–Li alloy
Interfacial bonding of low-pressure plasma-sprayed Fe-based amorphous coating on 8090 Al–Li alloy
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DOI：
10.1080/02670844.2023.2195085
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发表时间：
2023-02
影响因子：
2.8
通讯作者：
Shilei Hao;Shan-lin Wang;Yuhua Chen;Haoran Zhang
中科院分区：
文献类型：
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作者：
Shilei Hao;Shan-lin Wang;Yuhua Chen;Haoran Zhang
采用低压等离子喷涂技术在8090铝锂合金表面沉积了铁基非晶涂层。研究了涂层的微观结构和界面特征。涂层结构以非晶态为主。在两个薄片之间观察到一些结晶相。该涂层的腐蚀电流密度比8090低两个数量级。镀层平均孔隙率小于0.5%，密度高。在熔滴沉积过程中，由于8090合金的部分熔化和快速冷却，在AMC/8090 Al-Li合金的界面处形成了一个非晶过渡区，表明存在局部冶金结合。在电化学测试中，涂层表现出明显的钝化倾向，板片之间的结晶是腐蚀的主要原因。由于氧含量低，涂层具有优异的耐磨性。
Fe-based amorphous coatings (AMC) are deposited on 8090 Al–Li alloy using low-pressure plasma spraying. Coating's microstructure and interfacial characteristics are investigated. The coating is mainly amorphous in structure. Some crystalline phases were observed between the two splats. The corrosion current density of this coating is two orders of magnitude less compared to 8090. The coating has high density as the average porosity is less than 0.5%. Because of partial melting and quick cooling of the 8090 alloy in the process of molten droplets deposition, there is an amorphous transition zone formed at the interface of AMC/8090 Al–Li alloy, which indicates localized metallurgical bonding. In electrochemical testing, the coating shows an obvious passivation tendency, and crystallization between splats is the main cause of corrosion. Owing to the low oxygen content, the coating exhibits excellent wear resistance.