Interphase behavior of titanium matrix composites at elevated temperature

Matrix consolidation mechanism in 1D-Ti/SiC/C composites produced by continuous binder-powder coating

“…In CBPC process, results showed that both pressure and temperature are important parameters for matrix consolidation, contrary to the fiber-foil-fiber process in which the temperature has a less important role, as compared with the pressure [1][2] . Despite of the differences between binder-powder coating and fiber-foil-fiber manufacturing conditions, the final results concerning the matrix consolidation are in agreements 1,2,7,[12][13][14] . For all temperatures between 700 and 800 °C performed in CBPC process, both the plastic deformation and the diffusion bonding (as consequence) are weak and insufficient for porosity elimination, if a pressure of 100 MPa is applied.…”

“…Using the foil-fiber-foil manufacturing technique, Osborne et al 7 explained the porosity of the matrix, hot pressed in similar condition, considering the residual stress which arises during cooling. Because of the difference in coefficients of thermal expansions between SiC fiber and Ti matrix, porosity can be formed 7 .…”

“…Because of the difference in coefficients of thermal expansions between SiC fiber and Ti matrix, porosity can be formed 7 . Even though the interface reaction is weak, theses differences in thermal expansion cause an inherent residual stress in matrix, in both the normal and radial directions, which contributes to porosity in matrix.…”

“…During the last decade, performance improvement of these materials has been carried out by aeronautic and aerospace industries. Based on the part shapes and the method of metal/matrix coupling, various fabrication routes have been developed in industrial field [6][7][8][9][10][11][12] considering the fiber arrangements. According to Schüler et al 2 the influence of fiber volume fraction is slight in the range of 10-50% by volume.…”

A cohesive zone model for the elevated temperature interfacial debonding and frictional sliding behavior

“…Experimental investigations of fiber push-out in MMCs have shown that the applied load causes the fiber to debond progressively from the matrix, allowing relative sliding across the fiber/matrix interface [2,3]. The forces that cause the debonding at interface and promote frictional sliding have been observed to initially increase and then to decrease as the testing temperature increases [4,5]. The thermal residual stress during the manufacturing process further complicates the interpretation of the nonlinear decohesion and frictional behavior during the push-out process [6].…”