Effects of Amorphous and Nanocrystalline Structures on Hydrogen-Induced Optical Performance of Modulated Mg–Gd Films with Various Composition Fluctuations
Source abstract
Abstract
Nanomodification and amorphization are vital for improving the hydrogenation properties of magnesium (Mg)-based alloys. However, comparisons of their positive effects have been rarely presented because their usual fabrication process of annealing is hard to control. In this study, after tuning the composition fluctuation range, self-assembled well-ordered multilayer Mg0.7Gd0.3 films with an excessive amount of nanosized crystals were fabricated by deviating substrates to the edge of the sample stage, while relatively low crystallinity was gained at the center of the sample stage with a small composition fluctuation. It was demonstrated that the hydrogen diffusion rate in the sample deposited at the center with excessive amorphous regions was higher than that of the film fabricated at the edge with excessive nanocrystals regions. Besides, optical conversion ranges were monitored before and after the hydrogen absorption process. Films with large composition fluctuation possessed a high optical reflectance conversion range because the interference effects occurring inside improved their initial reflectance. However, films with small composition fluctuation inside gained a large transmittance conversion range due to their small nanostructured region.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Hydrogen Storage and Materials · MXene and MAX Phase Materials · Magnesium Alloys: Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Engineering Research Center of Light Alloy Net Forming, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
Materials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
University of Michigan−Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
Funding
State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Center of Hydrogen Science, Shanghai Jiao Tong University
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