Revealing microstructural evolution in CrFeCoNiMoBSi HEA coatings via HVOF-induction remelting

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-04-02 DOI:10.1016/j.vacuum.2025.114307

Shengwei Wang , Jianlei Zhang , Changsheng Zhai , Hongxing Zheng

引用次数: 0

Abstract

This study presents a novel method combining High-Velocity Oxygen Fuel (HVOF) spraying with induction remelting for large-scale production of high-quality coatings using CrFeCoNiMoBSi high-entropy alloy (HEA) self-fluxing powders. The microstructural evolution of these coatings, at various stages, on TP347H boiler tubes was characterized by XRD, EPMA, TEM, EBSD, and indentation. The results indicate partial amorphization during the HVOF spraying process, while induction remelting led to the formation of protective silicates and a reduction in porosity from 17.50 ± 0.79 vol% to 7.63 ± 0.70 vol%. Strong metallurgical bonding and improved microstructural characteristics were observed, offering valuable insights for enhancing HEA coating performance.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.