Al-Ti-B grain refiners via powder metallurgy processing of Al/K2TiF6/KBF4 powder blends

被引：23

作者：

Birol, Yucel ^{[1
]}

机构：

[1] TUBITAK, Marmara Res Ctr, Mat Inst, TR-41470 Kocaeli, Turkey

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 480卷 / 02期

关键词：

Metals; Powder metallurgy; Thermal analysis; Al-Ti-B alloy; REFINING MASTER ALLOYS; THERMAL EXPOSURE; ALUMINUM; PERFORMANCE; SOLIDIFICATION; NUCLEATION; K2TIF6; SYSTEM;

D O I：

10.1016/j.jallcom.2009.01.091

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The response to thermal exposure of ball-milled Al/K2TiF6/KBF4 powder blends was investigated to explore the potential of PM processing for the manufacture of Al-Ti-B alloys. K2TiF6 starts to be reduced by aluminium as early as 220 degrees C when ball-milled Al/K2TiF6/KBF4 powder blends are heated. The reaction of KBF4 with aluminium follows soon after. The Ti and B thus produced are both solutionized in aluminium before precipitating out as Al3Ti and TiB2. All these reactions take place below the melting point of aluminium. The ball-milled Al/K2TiF6/KBF4 powder blends heat treated at approximately 525 degrees C can be compacted to produce Al-Ti-B pellets with in situ formed Al3Ti and TiB2 particles. These pellets are shown to be adequate grain refiners for aluminium alloys. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：311 / 314

页数：4

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