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Vol.48, No.10, 957 ~ 964, 2010
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| Title |
| Effect of an Aging Treatment on the Interfacial Reaction and Mechanical Properties of an AS52+Sr/Al18B4O33 Magnesium Matrix Composite |
| 박용하 Yong Ha Park , 박용호 Yong Ho Park , 박익민 Ik Min Park , 조경목 Kyung Mox Cho |
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| Abstract |
| The aging behavior of aluminum borate whisker (Al18B4O33) reinforced AS52+Sr magnesium matrix composites was investigated with Vickers hardness measurements, bending tests, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Experimental results showed that aging is accelerated in the AS52+Sr/Al18B4O33 composite compared with an unreinforced AS52+Sr alloy. The hardness of the alloy and composite increases monotonically as a function of the aging time before reaching its peak hardness and then gradually decreases. The composite reaches its peak hardness in 10 h, whereas the matrix alloy requires 30h, indicating accelerated age-hardening in the AS52+Sr/Al18B4O33 composite compared with the unreinforced AS52+Sr alloy at 170℃. The interfacial reaction of AS52+Sr/Al18B4O33 magnesium matrix composite is considered to play a dominant role in the strengthening mechanism, ultimately affecting the mechanical properties of the composite. |
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| Key Words |
| Composites, casting, infiltration, aging, hardness test, transmission electron microscope, TEM, interfaces |
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