Distribution of TiB2 particles and its effect on the mechanical properties of A390 alloy
Distribution of TiB2 particles and its effect on the mechanical properties of A390 alloy
复制标题
TiB2颗粒分布及其对A390合金力学性能的影响
DOI：
10.1016/j.msea.2012.03.042
复制
发表时间：
2012-06-01
期刊：
影响因子：
6.4
通讯作者：
Liu, Xiangfa
中科院分区：
文献类型：
--
作者：
Li, Pengting;Li, Yunguo;Liu, Xiangfa
采用Al熔体反应法成功制备了TiB 2颗粒增强过共晶Al-Si（A390）基复合材料。在该复合材料中，TiB 2颗粒具有0.5至1.5 μ m的尺寸范围和块状形态。一些TiB 2颗粒在初晶Si内部，表明它们在凝固过程中被吞没。认为TiB_2颗粒表面能高，吸附能力强，易吸附在初晶Si中。采用边-边模型对TiB 2和Si进行了晶体学分析。结果表明，TiB 2合金具有良好的晶格匹配相干性，其匹配面和方向分别为< 1 1 2 >（Si）/<10（1）（0）（TiB 2），< 1 1 1 >（Si）/{0001}（TiB 2）。此外，添加3wt%TiB2颗粒的T，基础合金的机械性能，包括在300 ℃下的极限拉伸强度。延伸率和耐磨性得到明显提高。(C)2012爱思唯尔有限公司版权所有。
The hypereutectic Al-Si (A390) matrix composite reinforced with TiB2 particles was successfully prepared by Al melt reaction method. In the composite, TiB2 particles have a size range from 0.5 to 1.5 mu m and a block-like morphology. Some TiB2 particles are inside the primary Si, suggesting that they were engulfed during solidification. It is considered that TiB2 particles tend to be adsorbed into the primary Si, because of their high surface energy and strong adsorbability. Crystallographic analysis of TiB2 and Si was carried out with the edge-to-edge model. It is found that there exists good lattice matching coherence, which belongs to the matching planes and directions, < 1 1 2 >(Si)/< 1 0 (1) over bar 0)(TiB2), < 1 1 1 >(Si)/{0 0 0 1}(TiB2). Furthermore, T with 3 wt% TiB2 particles addition, the mechanical properties of the base alloy, including the ultimate tensile strength at 300 degrees C. percentage elongation and wear resistance, have been obviously improved. (C) 2012 Elsevier B.V. All rights reserved.