Electromagnetic vibration process for producing bulk metallic glasses
Electromagnetic vibration process for producing bulk metallic glasses
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DOI：
10.1038/nmat1341
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发表时间：
2005-04
期刊：
影响因子：
41.2
通讯作者：
T. Tamura;K. Amiya;R. Rachmat;Y. Mizutani;K. Miwa
中科院分区：
文献类型：
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作者：
T. Tamura;K. Amiya;R. Rachmat;Y. Mizutani;K. Miwa
众所周知，从液态冷却的速度是生产大块金属玻璃的一个重要因素。然而，其他因素如电场和磁场的影响尚未得到彻底研究。在这里，我们提出了一种新的方法来生产大块金属玻璃，通过使用电磁振动与同时施加的交流电流和磁场。该方法被认为是有效的，在Mg 65-Cu 25-Y 10（原子百分比）合金的表观玻璃形成能力的提高。实际上，在相同的冷却条件下，通过电磁振动过程可以获得更大的块体金属玻璃。我们推测，通过施加到液态的电磁振动，团簇的消失或减少导致晶体成核的抑制。这种电磁振动过程在其他大块金属玻璃系统中也是有效的，如果液态的团簇引起晶体形核的话。
It is known that the cooling rate from the liquid state is an important factor in the production of bulk metallic glasses. However, the effects of other factors such as electric and magnetic fields have not been thoroughly investigated. Here, we present a new method for producing bulk metallic glasses by using electromagnetic vibrations with simultaneous imposition of an alternating electric current and a magnetic field. This method was found to be effective in enhancing apparent glass-forming ability in Mg65-Cu25-Y10 (atomic percent) alloys. Indeed, larger bulk metallic glasses could be obtained by the electromagnetic vibration process under the same cooling conditions. We presume that disappearance or decrement of clusters by the electromagnetic vibrations applied to the liquid state cause suppression of crystal nucleation. This electromagnetic vibration process should be effective in other bulk metallic glass systems if the clusters in the liquid state cause the crystal nucleation.