급속응고 6061Al/Graphite 복합재료의 볼밀링 시간에 따른 흑연 분산거동 및 기계적 특성 (Effect of Ball milling Time on Graphite Dispersion and Mechanical Properties in Rapidly Solidified 6061 Al Composite)

서지정보

· 발행기관 : 한국분말재료학회
· 수록지 정보 : 한국분말재료학회지 / 16권 / 3호 / 209 ~ 216페이지
· 저자명 : 손현택, 이재설, 홍순직, 천병선

초록

A composite of rapidly solidified Al-6061 alloy powder with graphite particle reinforcements was
prepared by ball milling and subsequent hot extrusion. The microstructure and mechanical properties of these
composites were investigated as a function of milling time. With increasing milling time, the gas atomized initially
and spherical powders became elongated with a maximum aspect ratio after milling for 30 h. Then, refinement
and spheroidization were achieved by further milling to 70 h with a homogeneous and fine dispersion of graphite
particles forming between the matrix alloy layers. The best compression and wear properties were obtained in the
powder milled for 70 h, associated with the increased fine and homogeneous distribution of graphite particles in
the aluminum alloy matrix.

영어초록

A composite of rapidly solidified Al-6061 alloy powder with graphite particle reinforcements was
prepared by ball milling and subsequent hot extrusion. The microstructure and mechanical properties of these
composites were investigated as a function of milling time. With increasing milling time, the gas atomized initially
and spherical powders became elongated with a maximum aspect ratio after milling for 30 h. Then, refinement
and spheroidization were achieved by further milling to 70 h with a homogeneous and fine dispersion of graphite
particles forming between the matrix alloy layers. The best compression and wear properties were obtained in the
powder milled for 70 h, associated with the increased fine and homogeneous distribution of graphite particles in
the aluminum alloy matrix.

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