Glass formation and crystallization behavior in Mg65Cu25Y10−xGdx (x=0, 5 and 10) alloys |
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Authors: | H. Men D.H. Kim |
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Affiliation: | a Department of Metallurgical Engineering, Center for Non-Crystalline Materials, Yonsei University, 134 Shinchon-dong, Seodaemun-ku, Seoul 120-749, South Korea b Department of Physics, Center for Non-Crystalline Materials, Chongju University, Chongju 360-764, South Korea |
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Abstract: | The glass forming ability and crystallization behavior of Mg65Cu25Y10−xGdx (x=0, 5 and 10) alloys have been investigated. The glass forming ability (GFA) is significantly improved when Y in Mg65Cu25Y10 is substituted with Gd. Ternary Mg65Cu25Gd10 bulk metallic glass (BMG) with diameter of at least 8 mm was successfully fabricated by conventional Cu-mold casting method in air atmosphere. Mg2(Y, Gd) is the first competing crystalline phase against the glass formation in the Mg65Cu25Y10−xGdx (x=0, 5) alloys, while Mg2Cu and Cu2Gd are the competing crystalline phases in the Mg65Cu25Gd10 alloy. Therefore, the suppression of the formation of Mg2(Y, Gd) during cooling from the liquid improves the GFA significantly. |
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Keywords: | G180 C290 A196 |
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