Effect of Reheating Time on the In-situ Formation of Core-shell Structured Particle

Wang Yingjun; Chen Tijun; Zhang Suqing; Qin He; Cai Siyu

doi:10.15980/j.tzzz.2016.08.019

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Effect of Reheating Time on the In-situ Formation of Core-shell Structured Particle
Vol. 36, Issue 8, Pages: 848-851(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.08.019

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[1]王英俊,陈体军,张素卿,秦贺,蔡思雨.重熔时间对原位自生壳-芯结构粒子形成的影响[J].特种铸造及有色合金,2016,36(08):848-851.

Wang Yingjun, Chen Tijun, Zhang Suqing, et al. Effect of Reheating Time on the In-situ Formation of Core-shell Structured Particle. [J]. Special Casting & Nonferrous Alloys 36(8):848-851(2016)
[1]王英俊,陈体军,张素卿,秦贺,蔡思雨.重熔时间对原位自生壳-芯结构粒子形成的影响[J].特种铸造及有色合金,2016,36(08):848-851. DOI： 10.15980/j.tzzz.2016.08.019.

Wang Yingjun, Chen Tijun, Zhang Suqing, et al. Effect of Reheating Time on the In-situ Formation of Core-shell Structured Particle. [J]. Special Casting & Nonferrous Alloys 36(8):848-851(2016) DOI： 10.15980/j.tzzz.2016.08.019.

摘要

研究了部分重熔时间对壳-芯结构粒子形成过程的影响。结果表明

随着重熔时间延长

壳层厚度逐渐增加直至破裂并脱落。由XRD物相分析可知

随着重熔时间延长

壳层生成物由τ2相向Ti（Al

Si）3相转变。结合Al-7Si-Mg基体的研究发现

在590℃×30min可获得理想壳-芯结构粒子。通过纳米压痕仪对壳-芯结构硬度测试可知

壳层和芯部的微观硬度分别为6.97、1.22GPa。

Abstract

Effects of reheating time on the in-situ formation of core-shell structured particle were investigated.The results indicate that thickness of the shell is increased gradually to subsequently rupture and peel off with the increase of the reheating time.By the XRD analysis

the result shows that the reaction products are transformed fromτ2phase into Ti（Al

Si）3phase with increasing in the reheating time.The previous research indicates that the optimized temperature of the Al-7Si-Mg alloy powder is 590 ℃

where the matrix alloy possesses an ideal semisolid microstructure.The Ti core-shell structured can be obtained after being heated for 30 min at 590℃.The core-shell structural particle was tested by nanoindentor

and the results show that the microhardness of the shell and core reach up to 6.97 GPa

1.22 GPa

respectively.