Microstructure and mechanical properties of 2D woven Grf/Al composite
(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院
2.黑龙江省哈尔滨市东北林业大学机电工程学院
3.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
4.School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
2.黑龙江省哈尔滨市东北林业大学机电工程学院
3.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
4.School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
Abstract: A 2D woven graphite fibers reinforced aluminum matrix composite with 50%Grf (volume fraction) was fabricated by the squeeze-casting technology, and its microstructure and mechanical properties were investigated. The results show that the composite is dense, the graphite fibers are distributed uniformly in the composite. TEM observation indicates the bonding between fiber and matrix is good and little interfacial reaction is found in the Grf/Al composite. This is attributed to the better stability of graphite fiber and the fabrication process minimizing the contact time between fiber with matrix at high temperatures. The 2D woven Grf/Al composite exhibites better mechanical properties with tensile strength, bending strength and elastic modulus of 366.2, 519.7 and 110.7 GPa, respectively. SEM images suggeste that the fracture is irregular and some pulled-out fibers are found, which indicats that the high strength of fiber is not degraded.
Key words: 2D woven composites; graphite fiber; aluminum matrix composites; mechanical property