Evolution of the Microstructure and Properties of Pre-Boronized Coatings During Pack-Cementation Chromizing
Source abstract
Abstract
The effect of chromizing time on the microstructure and properties of B–Cr duplex-alloyed coating prepared by a two-step pack-cementation process was investigated. The phases, microstructure, and element distribution of three coatings obtained were characterized by X-ray diffraction (XRD), secondary electron imaging (SEI), backscattering electron imaging (BSEI), and energy dispersive spectroscopy (EDS), respectively. The results show that as the chromizing time increases, the net-like Fe2B and rod-like CrFeB phases in the coating gradually disappear, and finally completely transform into the block-like Cr2B and CrxCy (Cr7C3 and Cr23C6) phases. The growth kinetics analysis shows that interface reaction dominates the coating growth during the early stage of chromizing, while atomic diffusion gradually controls the coating growth at the later stage. The evolution mechanism of the B-Cr duplex-alloyed coating was also discussed.
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Research context
OpenAlex topics: Metal and Thin Film Mechanics · Advanced materials and composites · Diamond and Carbon-based Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
Chongqing Municipal Key Laboratory of Institutions of Higher Education for Mould Technology, Chongqing 400054, China
School of Materials and Energy, Southwest University, Chongqing 400715, China
Funding
National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Scientific and Technological Research Program of Chongqing · Scientific and Technological Research Program of Banan District of Chongqing · Graduate scientific research innovation project of Chongqing · Program for Innovation Team Building at Institutions of Higher Education in Chongqing
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