EFFECT OF COEXISTENCE OF SIMILAR ELEMENTS La AND Ce ON FORMATION OF (La-Ce)-Al-Cu BULK METALLIC GLASSES
EFFECT OF COEXISTENCE OF SIMILAR ELEMENTS La AND Ce ON FORMATION OF (La-Ce)-Al-Cu BULK METALLIC GLASSES
复制标题
相似元素La和Ce共存对(La-Ce)-Al-Cu块体金属玻璃形成的影响
DOI:
10.1142/s0217979209060749
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发表时间:
2009-03
影响因子:
1.7
通讯作者:
Yang, Qing
中科院分区:
文献类型:
--
作者:
Li, Ran;Pang, Shujie;Zhang, Tao;Yang, Qing
Bulk metallic glasses (BMGs) in pseudo-ternary (La-Ce)-Al-Cu system with high glass-forming ability (GFA) were synthesized based on the beneficial effect of the coexistence of similar elements La and Ce with similar atomic size and various valence electronic structures on GFA. With the coexistence of La and Ce in (LaxCe1-x)65Al10Cu25 system, bulk metallic glasses with diameters up to 12 mm can be produced by copper mold casting. Besides the high GFA, the (LaxCe1-x)65Al10Cu25 BMGs with x = 0.6 and 0.7 exhibit low glass transition temperature Tg around 362 K and wide supercooled liquid regions ΔTx (ΔTx = Tx - Tg, where Tx is the onset temperature of crystallization) of about 80 K. Compared with ternary La-Al-Cu and Ce-Al-Cu systems, significant improvement of GFA for the (La-Ce)-Al-Cu system is caused by the coexistence of similar elements La and Ce, and the mechanism is discussed from a thermodynamic viewpoint.
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影响因子:
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通讯作者:
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