摘要
采用电弧炉坩埚浇铸法制备Zr50Cu40Al10三元锆基块体非晶,研究了电磁搅拌合金熔体的作用。结果表明,虽然在该方法中合金熔体是仅在重力作用下自由充填铸模型腔,但与常用的真空吸铸铜模铸造法相比,铸模对合金熔体的激冷能力并没有明显的降低。电磁搅拌可减小合金熔体与坩埚底部由于欧姆接触所造成的“晶核污染”,因而使锆基块体非晶态合金具有更宽的过冷液相区温度范围?Tx和更高的热稳定性。
Zr50Cu40Al10 ternary bulk amorphous alloy sheet was prepared by a tilt casting method using ladle hearth type arc furnace. The function of electromagnetic stirring was researched during this process. It was shown that the chilling ability to alloy melt in this method can be compared with that in suction copper mold casting, although the alloy melt filled the mould cavity freely only under the action of gravitation in this method. Electromagnetic stirring is beneficial to the decrease of ＂crystal nucleus pollution＂, caused by the Ohmic contact between melt and water-jacket copper hearth, so that a larger supercooled liquid region ΔTx and better thermal stability can be obtained for the Zr-base bulk amorphous alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期998-1001,共4页
Rare Metal Materials and Engineering
