Reaction Mechanism of Superalloy K403 Corroded by Zinc Sulfide

被引：0

作者：

QI Shen ^{[1
,2
]}

YUAN Qiang ^{[1
]}

MAO Xiaojian ^{[1
]}

FENG Minghui ^{[1
]}

JIANG Benxue ^{[1
]}

ZHANG Long ^{[1
]}

机构：

[1] Key Laboratoiy of Materials for High-Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Science

[2] University of Chinese Academy of Sciences

来源：

JournaloftheChineseCeramicSociety | 2016年 / 3卷 / 02期

关键词：

superalloy; zinc sulphide; corrosion mechanism; hot pressing;

D O I：

暂无

中图分类号：

TG132.3 [特种热性质合金];

学科分类号：

080502 ;

摘要：

The corrosion of nickle superalloy by leaked zinc sulfide powders during hot pressing is the dominant factor which reduces the life time of the molds.In this work,the corrosion products were investigated by SEM and EDS.The corrosion procedure was evaluated on the aspects of both thermodynamics and kinetics.The results indicate that the vapor pressure of the produced zinc gas and the system temperature influence the reaction equilibrium.The liquid nickel sulfide at high temperature accelerates the reaction by transporting nickel to zinc sulfide surface.This study suggests that the corrosion resistance of the superalloy molds can be promoted by decreasing the system temperature or increasing the zinc vapor pressure.

引用

页码：71 / 77

页数：7