Effect of Nickel Pre-Plated on Microstructure and Oxidation Behavior of Aluminized AISI 316 Stainless Steel

被引：6
作者：
Karimzadeh, A. [1 ]
Rouhaghdam, A. Sabour [1 ]
机构：
[1] Tarbiat Modares Univ, Dept Mat Engn, Tehran, Iran
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2016年 / 31卷 / 01期
关键词：
Alumina; Aluminide; Aluminizing; Coating; Electroplating; Nickel; Oxidation; HIGH-TEMPERATURE-OXIDATION; DIFFUSION; COATINGS; RESISTANCE; ALLOY; SUPERALLOY; SCALES; DEGRADATION; IMPROVEMENT; MECHANISMS;
D O I：
10.1080/10426914.2015.1019091
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Aluminizing of nickel pre-plated AISI 316 is prepared by a high-activity pack at 1050 degrees C. The effect of initial nickel layer with different thicknesses on microstructure and oxidation behavior of coating is investigated. After aluminization, the surface microstructure of stainless steel mainly consists of -(Fe, Ni)Al as matrix with -FeAl + -(Fe, Cr) precipitates and an inter-diffusion layer with phase. Aluminized coating on specimens with 10 and 20 mu m primary thicknesses of the nickel layer includes three layers. The outer zone is made up of -NiAl thin layer and a -(Fe, Ni)Al layer. As the nickel layer increases to 50 and 100 mu m, aluminide layers consist of outer and inner zone with -NiAl and Ni3Al phase, respectively. Oxidation tests at 950 degrees C show that the oxidation resistance of aluminide coatings improves and oxidation kinetics follows a sub-parabolic rate law by increase in thickness of initial nickel layer.
引用
收藏
页码：87 / 94
页数：8
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