文章信息/Info

Title:

Solidification of Ternary Eutectic Alloys under Simulated Space Conditions

作者:

解文軍; 魏炳波

西北工業(yè)大學(xué)應(yīng)用物理系

Author(s):

XIE Wenjun;  WEI Bingbo

Department of Applied Physics, Northwestern Polytechnical University

關(guān)鍵詞:

三元共晶; 空間模擬條件; 凝固

Keywords:

Ternary Eutectics;  Simulated Space Conditions;  Solidification

DOI:

10.7502/j.issn.1674-3962.2017.12.01

文獻(xiàn)標(biāo)志碼:

A

摘要:

三元共晶凝固過程涉及三個(gè)固相在同一液相中的競(jìng)爭(zhēng)形核和協(xié)作生長(zhǎng)，可以形成豐富多樣的凝固組織，對(duì)發(fā)展原位復(fù)合材料制備技術(shù)和研究自發(fā)模式形成現(xiàn)象都具有重要的意義�？臻g環(huán)境中的微重力和無容器效應(yīng)消除了重力引起的對(duì)流、沉降以及器壁引起的異質(zhì)形核，為深入研究非平衡快速凝固規(guī)律提供了理想的實(shí)驗(yàn)條件。本文對(duì)國(guó)內(nèi)外采用浸浮凈化、自由落體、超聲懸浮等地面模擬方法開展的三元共晶合金凝固研究工作進(jìn)行了綜述，并對(duì)未來發(fā)展趨勢(shì)進(jìn)行了展望。

Abstract:

The solidification of ternary eutectic alloys involves competitive nucleation and cooperative growth of three solid phases in the same mother liquid phase, which generates plenty of microstructural morphologies. This is of importance for the methodological study of in situ composite material preparation as well as theoretical exploration of pattern formation phenomena. The microgravity effect and containerless state in space environment eliminates the convection and buoyancy induced by gravity, and avoids the heterogeneous nucleation originated from container walls, providing an ideal experimental condition for rapid solidification of metastable melts. This paper reviews the recent progress of ternary eutectic solidification research, performed with such ground simulation methods as glass fluxing, drop tube, and acoustic levitation. The prospective developing trends are also discussed.