Grain refiner fabricated by spark plasma sintering for hypoeutectic Al-Si alloy cast and its refining ability

被引：0
|
作者：
Sato, Hisashi [1 ]
Nakamura, Fumiya [1 ]
Watanabe, Yoshimi [1 ]
机构：
[1] Nagoya Inst Technol, Grad Sch Engn, Gokiso Cho,Showa Ku, Nagoya 4668555, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2024年 / 63卷 / 11期
基金：
日本科学技术振兴机构;
关键词：
grain refinement; spark plasma sintering; casting; Al-Si alloy; EUTECTIC SI; PURE AL; NUCLEATION; MICROSTRUCTURE; PARTICLES; MECHANISM; BEHAVIOR; SILICON; GROWTH;
D O I：
10.35848/1347-4065/ad8acd
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Grain refiner fabricated by spark plasma sintering (SPS) for an as-cast hypoeutectic Al-Si alloy were proposed. The proposed grain refiner contains Al3Ti and Na flux particles in an Al-11 mass%Si alloy matrix. Through SPS, the grain refiner were obtained without any reaction between the Al3Ti particles, Na flux particles, and Al-11 mass%Si alloy matrix. Casting tests were conducted using the proposed grain refiners, and the refiners reduced the dendrite cell size and the dendrite arm spacing of the primary alpha-Al phase, as well as the lamellar spacing of the eutectic structure. The eutectic Si phase changed to a granular shape upon the refinement of the eutectic structure. Furthermore, the tensile strength and ductility of the as-cast Al-11 mass%Si alloy were drastically improved by adding the proposed grain refiner. This improvement was attributed to the refinement and granulation of the eutectic Si phase.
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页数：10
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