Effect of in situ phases on microstructure and properties in Al-Bi immiscible alloy
Effect of in situ phases on microstructure and properties in Al-Bi immiscible alloy
复制标题
原位相对Al-Bi难混溶合金组织和性能的影响
DOI：
10.1080/02670836.2020.1769880
复制
发表时间：
2020
影响因子：
1.8
通讯作者：
Wang Engang
中科院分区：
文献类型：
--
作者：
Man Tiannan;Xiang Zhaolong;Zhang Lin;Wang Engang
Al-Bi非混相合金是具有少数相均匀分布的潜在自润滑磨损材料。然而，由于Al-Bi不混相合金的液相分离，传统的铸造方法难以获得均匀的组织。本文提出了一种抑制液相分离、提高铝铋非混相合金性能的新方法。其相作为非均相形核位点，加速了富bi液滴的形核，减缓了液滴的速度，使得Al-Bi不混相合金的尺寸显著减小，组织均匀。在Al-Bi非混相合金中加入sial2cuphase可进一步提高其自润滑耐磨性。
Al–Bi immiscible alloy is of particular interest as potential self-lubricating wear materials with a homogeneous distribution of minority phase. However, it is difficult to obtain a homogeneous microstructure by conventional casting methods due to liquid phase separation of Al–Bi immiscible alloy. We have developed a new strategy to restrain liquid phase separation and improve the properties of Al–Bi immiscible alloy byin situphases. Thein situAlB2phase acts as heterogeneous nucleation site to accelerate the nucleation and slow down the velocity of the Bi-rich droplet, resulting in a significant size reduction and a homogeneous microstructure of Al–Bi immiscible alloy. The self-lubricating wear resistance of Al–Bi immiscible alloy can be further enhanced byin situAl2Cuphase.