Ultrasonic treatment for the refinement of brittle CaZn13 phases in a biomedical Zn-Cu-Ca alloy

被引：20
作者：
Balasubramani, Nagasivamuni [1 ]
Yang, Nan [1 ]
Venezuela, Jeffrey [1 ]
Dargusch, Matthew [1 ]
机构：
[1] Univ Queensland, Ctr Adv Mat Proc & Mfg AMPAM, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia
来源：
MATERIALS LETTERS | 2021年 / 305卷 / 305期
基金：
澳大利亚研究理事会;
关键词：
Ultrasonic treatment; Zn-Cu-Ca alloy; Microstructure; Solidification; CaZn13; phase;
D O I：
10.1016/j.matlet.2021.130754
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultrasonic treatment (UST) for the refinement of long, coarse and branched dendrites of CaZn13 phases in Ca containing Zn-Cu-Ca alloys has been investigated. UST applied in the L + CaZn13 region led to a significant reduction in the average size of CaZn13 phases from larger than 150 mu m to < 20 mu m. Longer UST time of 7 min from 620 degrees C to 420 degrees C at a cooling rate of 0.5 degrees C/s resulted in excessive Ti dissolution from the sonotrode and formed primary Zn-Ti phases. Increasing the cooling rate to 4.0 degrees C/s, reducing the UST time to 2 min and the temperature range from 620 degrees C to 450 degrees C followed by immediate pouring offered the best refinement with a lower concentration of Ti.
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页数：4
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