Difference oxidation behaviors of Ni8Al and Ni25Cr coatings in air with water vapor at 650∘-Reference-Cited by-同舟云学术

Difference oxidation behaviors of Ni8Al and Ni25Cr coatings in air with water vapor at 650∘

Published:2021-03-19 Issue: Volume: Page:2150274
ISSN:0217-9849
Container-title:Modern Physics Letters B
language:en
Short-container-title:Mod. Phys. Lett. B

Author:

Li Dingjun¹²,Huang Wenlang³,Yuan Xiaohu¹⁴,Huang Taihong³,Li Chao³,Song Peng³

Affiliation:

1. State Key Laboratory of Long-life High Temperature Materials, Dong Fang Turbine Co., Ltd., Deyang, Sichuan 61800, China

2. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China

3. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

4. School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Abstract

The oxidation behaviour of Ni8Al and Ni25Cr coatings produced by high velocity oxygen fuel spray (HVOF) which were deposited on Fe-based alloys (CB2) was investigated. We simulated the service environment of the steam generator unit, and put the samples in a thermostatic tube furnace at 650[Formula: see text] in air with 20 wt.% water vapor for 1000 hours of cyclic oxidation. The formation mechanism are explained using SEM, XRD, and EDX. There were no spallations and obvious cracks in both coatings. Ni25Cr coating generated a better protection oxides scale than that scale on Ni8Al. The behavior and mechanism of the oxide scale formation had an important influence in coatings and we have discussed these phenomenons in the study.

Funder

State Key Laboratory of Long-life High Temperature Materials

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217984921502742