| 학회 |
한국재료학회 |
| 학술대회 |
2006년 가을 (11/03 ~ 11/03, 수원대학교) |
| 권호 |
12권 2호 |
| 발표분야 |
구조 재료 |
| 제목 |
Microstructure Evolution in Thermally Managed Carbon and Graphite Fiber Reinforced Aluminum Alloys |
| 초록 |
The effect of external heat extraction through reinforcing fibers on the solidification morphology and nucleation was examined in graphite fiber reinforced 2014 aluminum alloys processed through a squeeze casting. In order to enhance the local solidification rate of the matrix alloy, the carbon and graphite fibers were externally cooled by exposing their ends to ambient air during squeeze pressure infiltration. The resultant solidification morphologies in assistance with composition measurements and nucleation were characterized by analytical instruments. The detailed microstructures exhibited significant differences in fiber reinforced matrices between carbon and graphite fiber aluminum alloy composites; the columnar-like solid arms were developed in the carbon fiber reinforced matrices, while in the graphite fiber reinforced matrices the planar-like solid arms were evolved. It was apparent that external heat extraction though the reinforcing graphite fibers led to the formation of single alpha-Al envelops on the fiber surfaces and then relatively small extent of solute microsegregation compared to that of the carbon fiber composite. High resolution transmission electron microscopy (HRTEM) used to characterize the interface structure uncovered (002)α-Al // (0002)GR orientation relationship at the α-Al/graphite fiber interfaces. |
| 저자 |
성환구1, H.F. Lopez2, Marija Gajdardziska-Josifovska3, P. Rohatgi3, 허보영3
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| 소속 |
1아이큐브 사업단, 2경상대, 3Univ. of Wisconsin-Milwaukee |
| 키워드 |
external heat extraction; infiltration; microsegregation; nucleation
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| E-Mail |
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