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Enhanced glass forming ability and refrigerant capacity of a Gd55Ni22Mn3Al20 bulk metallic glass |
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| Authors: | L Xia KC Chan MB Tang |
| Affiliation: | a Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China b Institute of Materials, Shanghai University, Shanghai 200072, China c Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
| Abstract: | In this work, a small amount of Mn was added to a Gd55Ni25Al20 glass forming alloy, as a replacement for Ni, and a Gd55Ni22Mn3Al20 bulk metallic glass (BMG) was obtained by suction casting. Its glass forming ability (GFA) was characterized by X-ray diffraction and differential scanning calorimetry, and its magnetic properties were measured using a magnetic property measurement system. It is found that the minor Mn addition can significantly improve both the GFA and the magnetocaloric effect (MCE) of the alloy. The refrigerant capacity (RC) of the BMG can reach a high value of 825 J kg−1 under a field of 3979 kA/m, which is about 29% larger than that of a Gd55Ni25Al20 BMG. The effect of the minor Mn addition on the GFA and MCE of the BMG was investigated in the study. |
| Keywords: | Bulk metallic glass Glass forming ability Magnetocaloric effect Micro-alloying |
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