TY - JOUR
T1 - A novel powder-fiber-foil approach to fabricating woven SiC fiber-reinforced titanium matrix composite
T2 - Microstructure and mechanical properties
AU - Xiao, Yi
AU - Zhao, Tianwen
AU - Xiao, Rui
AU - Li, Jinshan
AU - Wang, Chuan
AU - Du, Huiqiao
AU - Li, Yong
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/12
Y1 - 2025/12
N2 - The woven SiCf/Ti composite is fabricated by a novel powder-fiber-foil method using the polymer-derived (PD) SiC fiber, titanium alloy matrix powder, and foil as the raw materials in this work. The microstructure evolution, microhardness distribution, and tensile properties of the composite have been systematically investigated to elucidate the mechanisms of fabrication, fracture, and reinforcement. The results show that the titanium alloy matrix foil and powder mainly evolve into an equiaxed structure. Both the titanium alloy matrix powder/foil interface and the SiCf/Ti interface are well bonded. The microstructure evolution is owing to the fabrication mechanisms of the powder-foil coupling, powder densification, and fiber/matrix bonding. The fabricated woven SiCf/Ti composite exhibits low density (3.25 g/cm3) and low thermal conductivity (1.325 W/(m·K)). The microhardness of the composite (418 H V, 380 H V, and 376 H V) is higher than that of the matrix foil in all directions. The microhardness presents a gradient along the thickness in both the length direction and width direction. Compared with the titanium alloy matrix, the tensile strength (1021 MPa) and specific strength of the composite are significantly improved, which is attributed to the reinforcement mechanisms of the fiber pullout and bridging. The fracture mechanisms of the composite are characterized by combined fracture behaviors, including ductile fracture of the titanium alloy matrix, brittle fracture of the near-interface zone, and pullout of the woven SiC fiber. The microstructure and mechanical properties of the composite exhibit no obvious difference in the length direction and width direction. It is concluded that the woven SiCf/Ti composites without significant anisotropy can be successfully fabricated by the novel powder-fiber-foil method, thus establishing a foundation for their applications in hypersonic vehicle skins.
AB - The woven SiCf/Ti composite is fabricated by a novel powder-fiber-foil method using the polymer-derived (PD) SiC fiber, titanium alloy matrix powder, and foil as the raw materials in this work. The microstructure evolution, microhardness distribution, and tensile properties of the composite have been systematically investigated to elucidate the mechanisms of fabrication, fracture, and reinforcement. The results show that the titanium alloy matrix foil and powder mainly evolve into an equiaxed structure. Both the titanium alloy matrix powder/foil interface and the SiCf/Ti interface are well bonded. The microstructure evolution is owing to the fabrication mechanisms of the powder-foil coupling, powder densification, and fiber/matrix bonding. The fabricated woven SiCf/Ti composite exhibits low density (3.25 g/cm3) and low thermal conductivity (1.325 W/(m·K)). The microhardness of the composite (418 H V, 380 H V, and 376 H V) is higher than that of the matrix foil in all directions. The microhardness presents a gradient along the thickness in both the length direction and width direction. Compared with the titanium alloy matrix, the tensile strength (1021 MPa) and specific strength of the composite are significantly improved, which is attributed to the reinforcement mechanisms of the fiber pullout and bridging. The fracture mechanisms of the composite are characterized by combined fracture behaviors, including ductile fracture of the titanium alloy matrix, brittle fracture of the near-interface zone, and pullout of the woven SiC fiber. The microstructure and mechanical properties of the composite exhibit no obvious difference in the length direction and width direction. It is concluded that the woven SiCf/Ti composites without significant anisotropy can be successfully fabricated by the novel powder-fiber-foil method, thus establishing a foundation for their applications in hypersonic vehicle skins.
KW - Interface
KW - Mechanical properties
KW - Microstructure
KW - Titanium matrix composite
KW - Vacuum hot pressing
KW - Woven SiC fiber
UR - https://www.scopus.com/pages/publications/105018913943
U2 - 10.1016/j.msea.2025.149286
DO - 10.1016/j.msea.2025.149286
M3 - 文章
AN - SCOPUS:105018913943
SN - 0921-5093
VL - 948
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
M1 - 149286
ER -