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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of Pt addition on the crystallization of Co-based amorphous metallic alloys
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Effect of Pt addition on the crystallization of Co-based amorphous metallic alloys

机译：Pt添加对Co基非晶态金属合金结晶的影响

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摘要

Amorphous metallic alloys, Co_(73)Pt_5B_(10)Si_(12) and Co_(63)Pt_(15)B_(10)Si_(12), were thermally annealed to study the effects of Pt on the annealed microstructure and resulting magnetic properties of the two glasses. The Co-Pt metallic glasses were fully crystallized between 500 and 600 deg C with increasing amount of Pt addition proportionally lowering the devitrification temperature. In addition, Pt addition favored the nucleation of the h.c.p. phase which converted to the f.c.c. phase as the annealing temperature was increased, whereas the Pt-free Co_(78)B_(10)Si_(12) glass crystallized into the f.c.c. structure from the beginning. The crystallized Co-Pt alloys also showed high coercivities resulting from the relatively small grain size and numerous structural defects providing the domain wall pinning sites. It was also shown that Pt atoms in the crystallized alloy suppressed the precipitation of secondary phases as the expanded crystalline lattice due to the Pt addition enabled better accommodation of the metalloid elements.
机译：对非晶态金属合金Co_（73）Pt_5B_（10）Si_（12）和Co_（63）Pt_（15）B_（10）Si_（12）进行热退火以研究Pt对退火后的显微组织和所产生的磁性的影响两杯的特性。 Co-Pt金属玻璃在500至600摄氏度之间完全结晶，随着Pt添加量的增加，成比例地降低了失透温度。另外，Pt的添加有利于h.c.p的成核。转换为f.c.c.随退火温度的升高，相变无相，而无Pt的Co_（78）B_（10）Si_（12）玻璃结晶成f.c.c。从一开始的结构。结晶的Co-Pt合金还显示出较高的矫顽力，这是由于相对较小的晶粒尺寸和众多结构缺陷所致，这些缺陷提供了畴壁固定位点。还显示出结晶合金中的Pt原子抑制了第二相的沉淀，这是由于Pt的添加使膨胀的晶格能够更好地容纳准金属元素。

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