期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 502, 期 -, 页码 71-75出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2018.06.038
关键词
Ti-based bulk metallic glass; Icosahedral quasicrystal phase; Primary crystallization enthalpy; High GFAs; Fracture strength
资金
- National Natural Science Foundation of China [51790484, 51434008, U1435204, 51531005]
- Science and Technology Planning Project of Guangdong Province, China [2015B090926001, 2015B010122001]
- Shuangchuang Project of Jiangsu Province, China
New Ti-based bulk metallic glasses (BMGs) of Ti32.8+xZr30.2-xNi5.3Cu9Be22.7 (3 <= vertical bar X vertical bar <= 15, at.%) with large size were prepared. The results reveal that the forming of primary icosahedral quasicrystal phase (I-phase) and the enthalpy of the primary crystallization (Delta H-1) were closely related to the glass forming abilities (GFAs). Thecrystallization product of the metallic glass alloys at primary crystallization state is a metastable I-phase. It is demonstrated that apparent activation energy for crystallization obtained by fitting the Kissinger equation at T-x temperature increases with the increase of Ti concentration, while GFAs deteriorate. The Delta H-1 of metallic glasses declines with the increase of Ti concentration. The Ti32.8+XZr30.2-XNi5.3Cu9Be22.7 possess high similar compressive fracture strength of about 1800 MPa, which is one of the best options as structural materials on account of high specific strength and low cost.
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