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Publication Type : Journal Article
Source : Journal of American Ceramic Society, (2020) https://doi.org/10.1111/jace.17323.
Url : https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/jace.17323
Campus : Chennai
School : School of Engineering
Department : Chemistry
Year : 2020
Abstract : The compressive creep of a SiC whisker (SiCw) reinforced Ti3SiC2 MAX phase-based ceramic matrix composites (CMCs) was studied in the temperature range 1100-1300°C in air for a stress range 20-120 MPa. Ti3SiC2 containing 0, 10, and 20 vol% of SiCw was sintered by spark plasma sintering (SPS) for subsequent creep tests. The creep rate of Ti3SiC2 decreased by around two orders of magnitude with every additional 10 vol% of SiCw. The main creep mechanisms of monolithic Ti3SiC2 and the 10% CMCs appeared to be the same, whereas for the 20% material, a different mechanism is indicated by changes in stress exponents. The creep rates of 20% composites tend to converge to that of 10% at higher stress. Viscoplastic and viscoelastic creep is believed to be the deformation mechanism for the CMCs, whereas monolithic Ti3SiC2 might have undergone only dislocation-based deformation. The rate controlling creep is believed to be dislocation based for all the materials which is also supported by similar activation energies in the range 650-700 kJ/mol.
Cite this Research Publication : Apurv Dash, Ju¨rgen Malzbender, Khushbu Dash, Marcin Rasinski, Robert Vaßen, Olivier Guillon, Jesus Gonzalez Julian, "Compressive creep of SiC whisker/Ti3SiC2 composites at high temperature in air", Journal of American Ceramic Society, (2020) https://doi.org/10.1111/jace.17323.