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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (28권6호 268-272)

Effect of Aging on the Interfacial Characteristics of Al18B4O33/AS52 Mg Matrix Composite by Squeeze infiltration

용탕가압침투법으로 제조한 Al18B4O33/AS52 Mg기 복합재료의 계면 특성에 미치는 시효의 영향

Yong-Ha Park, Yong-Ho Park, Kyung-Mox Cho, Ik-Min Park

Pusan National University

Abstract

Interfacial characteristics of aluminum borate whisker reinforced AS52 matrix composite was investigated. Peak hardness of AS52 composite was obtained aging at 170 oC for 15h and the aging process was accelerated by the presence of the aluminium borate whisker. The MgO layer, which was the interfacial reaction product between the reinforcement and the Mg matrix, was produced with 20 nm thickness in as-cast condition. As the aging time increased, the thickness of the interfacial reaction layer increased to 50 nm in peak aged condition. The nano-indentation test results indicated that the strength of interface was improved by the aging but over-aging degraded the reinforcement and decreased the interfacial strength which resulted in the decrease of overall composite strength.

Keywords

Squeeze Infiltration, AS52 alloy, Magnesium matrix composite, Aging test, nano-indentation, Microstructure