TY - GEN
T1 - Fabrication of Csf/Mg composites using extrusion directly following vacuum infiltration - Part 2
T2 - Semi-Solid Processing of Alloys and Composites 10 - Selected, peer reviewed papers from the 10th International Conference on Semi-Solid Processing of Alloy and Composites, S2P 2008
AU - Qi, Lehua
AU - Zhou, Jiming
AU - Su, Lizheng
AU - Ouyang, Haibo
AU - Li, Hejun
PY - 2008
Y1 - 2008
N2 - Extrusion directly following vacuum infiltration is a special forming technique that combines the advantages of liquid metal infiltration and semisolid extrusion. The major advantages of this process are elimination of porosity and shrinkage, good surface finish, good dimensional accuracy, high strength to weight ratio and near net shaping. Magnesium matrix composites are fabricated usually through stirring casting, powder forming, injecting deposition, liquid metal infiltration or die casting at present time. However few investigations on magnesium matrix composite are conducted for the specific characteristics of magnesium alloy, such as high chemical activity and easy oxidation. The present paper is focused on Csf/Mg composites obtained via infiltration of porous short carbon fiber preform by liquid Magnesium. The complete experiment setup is designed and fabricated by ourselves, which include the forming molds, the unit for melting the magnesium, the unit for vacuuming and the monitoring and collecting system of forming process parameters. In this method the whole experiment setup is vacuumed firstly. Then the pressurized nitrogen is used to infiltrate the magnesium melt through a porous preform of short carbon fibers. After the infiltration completed, the punch of the press extrude the magnesium-infiltrated preform out of the forming die to form the tubes or bars. X-ray diffraction (XRD), optical and SEM microscopes were used to characterize the infiltration and the microstructure of fabricated composites. The compression test was used to characterize the mechanical properties of fabricated composites. The results show that the preform was infiltrated thoroughly by melt magnesium and the fabricated Csf/Mg composites have excellent mechanical properties compared with the magnesium alloys. C sf/Mg composites should be very promising candidates for automobile parts and portable electronic appliance parts in the future.
AB - Extrusion directly following vacuum infiltration is a special forming technique that combines the advantages of liquid metal infiltration and semisolid extrusion. The major advantages of this process are elimination of porosity and shrinkage, good surface finish, good dimensional accuracy, high strength to weight ratio and near net shaping. Magnesium matrix composites are fabricated usually through stirring casting, powder forming, injecting deposition, liquid metal infiltration or die casting at present time. However few investigations on magnesium matrix composite are conducted for the specific characteristics of magnesium alloy, such as high chemical activity and easy oxidation. The present paper is focused on Csf/Mg composites obtained via infiltration of porous short carbon fiber preform by liquid Magnesium. The complete experiment setup is designed and fabricated by ourselves, which include the forming molds, the unit for melting the magnesium, the unit for vacuuming and the monitoring and collecting system of forming process parameters. In this method the whole experiment setup is vacuumed firstly. Then the pressurized nitrogen is used to infiltrate the magnesium melt through a porous preform of short carbon fibers. After the infiltration completed, the punch of the press extrude the magnesium-infiltrated preform out of the forming die to form the tubes or bars. X-ray diffraction (XRD), optical and SEM microscopes were used to characterize the infiltration and the microstructure of fabricated composites. The compression test was used to characterize the mechanical properties of fabricated composites. The results show that the preform was infiltrated thoroughly by melt magnesium and the fabricated Csf/Mg composites have excellent mechanical properties compared with the magnesium alloys. C sf/Mg composites should be very promising candidates for automobile parts and portable electronic appliance parts in the future.
KW - Liquid infiltration
KW - Magnesium matrix composite
KW - Mechanical properties
KW - Microstructure
KW - Preform fabrication
UR - http://www.scopus.com/inward/record.url?scp=85088735350&partnerID=8YFLogxK
U2 - 10.4028/3-908451-59-0.91
DO - 10.4028/3-908451-59-0.91
M3 - 会议稿件
AN - SCOPUS:85088735350
SN - 9771012039401
T3 - Solid State Phenomena
SP - 91
EP - 96
BT - Semi-Solid Processing of Alloys and Composites X - Selected, peer reviewed papers from the 10th International Conference on Semi-Solid Processing of Alloys and Composites, S2P 2008
PB - Trans Tech Publications Ltd
Y2 - 16 September 2008 through 18 September 2008
ER -