Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (5): 573-584.DOI: 10.1007/s40195-018-0811-8
Special Issue: 2019年复合材料专辑; 2019年铝合金专辑
• Orginal Article • Previous Articles Next Articles
Fumio Ogawa1(), Shuji Yamamoto2(), Chitoshi Masuda3()
Received:
2018-05-14
Revised:
2018-06-20
Online:
2019-05-10
Published:
2019-05-27
Fumio Ogawa, Shuji Yamamoto, Chitoshi Masuda. Thermal Conductivity and Tensile Properties of Carbon Nanofiber-Reinforced Aluminum-Matrix Composites Fabricated via Powder Metallurgy: Effects of Ball Milling and Extrusion Conditions on Microstructures and Resultant Composite Properties[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(5): 573-584.
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Fabrication route | Ball-milling conditions | SPS and/or hot extrusion condition |
---|---|---|
SPS | 90 rpm, 3 h, ball-to-weight ratio = 20:1 (aluminum particle size: 3 μm) | SPS: 560 °C, 2 h, 50 MPa |
SPS and hot extrusion | 90 rpm, 3 h, ball-to-weight ratio = 20:1 (aluminum particle size: 3 μm) | SPS: 560 °C, 2 h, 50 MPa Hot extrusion: 500 °C, 0.1 mm/min, R9 |
Powder extrusion | 200 rpm, 3 h, ball-to-weight ratio = 20:1 (aluminum particle size: 30 μm) | Powder extrusion: 550 °C, 20 mm/min, R9 (holding time: 0.5 h), R16 (holding time: 1.5 h) |
Table 1 Fabrication conditions of CNF-reinforced aluminum-matrix composites
Fabrication route | Ball-milling conditions | SPS and/or hot extrusion condition |
---|---|---|
SPS | 90 rpm, 3 h, ball-to-weight ratio = 20:1 (aluminum particle size: 3 μm) | SPS: 560 °C, 2 h, 50 MPa |
SPS and hot extrusion | 90 rpm, 3 h, ball-to-weight ratio = 20:1 (aluminum particle size: 3 μm) | SPS: 560 °C, 2 h, 50 MPa Hot extrusion: 500 °C, 0.1 mm/min, R9 |
Powder extrusion | 200 rpm, 3 h, ball-to-weight ratio = 20:1 (aluminum particle size: 30 μm) | Powder extrusion: 550 °C, 20 mm/min, R9 (holding time: 0.5 h), R16 (holding time: 1.5 h) |
Fig. 4 Thermal conductivities of the sintered CNF-aluminum composites in the directions perpendicular to the T and P planes as a function of the CNF volume fraction
Fig. 6 Thermal conductivities of CNF-aluminum composites fabricated via SPS followed by hot extrusion, plotted as a function of the CNF volume fraction
Fig. 11 Nominal stress-nominal strain curve of the 0.5% CNF-aluminum composite fabricated by SPS and hot extrusion; the corresponding curve for pure aluminum is also shown
Fig. 21 FESEM image of aluminum grains in 2.0% CNF-aluminum composites fabricated by powder extrusion at extrusion ratio of 9 at a different position from Fig. 20
Fig. 24 FESEM image of aluminum grains in 2.0% CNF-aluminum composites fabricated by powder extrusion at an extrusion ratio of 16 in a different position from Fig. 23
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