Contribution of Si to the precipitation of γ'-phase in high Al content IN718 coatings and the phase transformation of α-Al2O3 during high temperature oxidation

被引：3

作者：

Zhou, Jie ^{[1
]}

Liu, Zhicheng ^{[1
]}

Peng, Wenyi ^{[1
]}

Wei, Xiang ^{[1
]}

Luo, Rukai ^{[1
]}

Deng, Xiaohua ^{[1
]}

Tan, Ting ^{[1
]}

Liu, Jun ^{[2
]}

Luo, Xianzhi ^{[2
]}

Xu, Xinshui ^{[3
]}

Wang, Yuqing ^{[1
]}

Peng, Biao ^{[1
]}

机构：

[1] Nanchang Univ, Nanchang 330031, Peoples R China

[2] Dashan Concentrator Dexing Copper Mine Jiangxi Cop, Dexing 334200, Peoples R China

[3] Xing Foundry Co Ltd, Jiangxi Copper Grp, Dexing 334224, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 22期

关键词：

IN718; Al-Si composite modified; High temperature resistance; Plasma cladding; First principles study; alpha-Al2O3; transformation; SINGLE-CRYSTAL; INCONEL; 718; BEHAVIOR; MICROSTRUCTURE; DIFFUSION; 1ST-PRINCIPLES; SEGREGATION; SUPERALLOY; RESISTANCE; MORPHOLOGY;

D O I：

10.1016/j.ceramint.2023.07.060

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Al-Si composite-modified IN718 alloy has not been studied in depth thus far. In this paper, an Al-Si composite-modified IN718 coating was successfully fabricated by plasma cladding, and it was found that Al-Si increases the composition supercooling of the alloy melt, increases the proportion of equiaxed crystals in the coating, and greatly enhances the hardness of the coating through the precipitation of a large area of the gamma'-phase. The changes in the properties of the gamma and gamma'-phases before and after Si doping were clarified by firstprinciples studies. High-temperature experiments show that the Al-Si IN718 coating has excellent resistance to high-temperature oxidation and that the addition of Si promotes the phase transformation of alpha-Al2O3 in the early stages of oxidation.

引用

页码：34375 / 34386

页数：12

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