Phase, microstructure and service character of as-deposited and short-time heat-treated Ni-Mo alloys with mixed state

Considering the amorphous and nano-crystalline cluster structure and their activity, on the basis of the mixed structure Ni-Mo alloys, the crystallization kinetics of the alloys and the performance of the alloys after heat treatment with different mixed structure were studied. The phase structure an...

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Bibliographic Details
Published in:PloS one 2021-05, Vol.16 (5), p.e0249875-e0249875
Main Authors: Xu, Hong, Li, Ning, Zhuo, Qinghua, Lu, Lirong, Chen, Weizeng
Format: Article
Language:English
Subjects:
Alloys
Ammonia
Ammonium
Amorphous alloys
Amorphous materials
Amorphous structure
Analysis
Cathodic dissolution
Corrosion resistance
Crystallization
Crystals
Dissolution
Electrodes
Electroplating
Engineering
Engineering and Technology
Engineering schools
Ethylenediaminetetraacetic acids
Experimental methods
Heat
Heat treatment
Heat treatments
Heating rate
Low carbon steels
Metallic glasses
Molybdenum
Nanocrystals
Nickel base alloys
Nitric acid
Phase composition
Physical Sciences
Physicochemical properties
Protective coatings
Structure
Thermal analysis
Urea
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Summary:Considering the amorphous and nano-crystalline cluster structure and their activity, on the basis of the mixed structure Ni-Mo alloys, the crystallization kinetics of the alloys and the performance of the alloys after heat treatment with different mixed structure were studied. The phase structure and composition were determined by X-ray powder diffraction. The crystallization activation energy of the mixed structure was obtained by differential scanning calorimetry. The electrochemical activity of the mixed structure alloy was determined by electrochemical analysis. The experimental results show that the structural stability of the mixed-structure alloy is better, but the crystallization activation energy is much lower than that of the amorphous alloy. The crystallization process consists of a meta-stable structure transition and a new phase formation. The electrochemical properties of the alloy indicated that the alloy with the mixed structure has higher electrochemical activity, with higher hardness and better corrosion resistance, which results from the large true contact surface and the large number of active centers in this material structure.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0249875