| Summary: | Element reaction−diffusion of Ti/Al<sub>2</sub>O<sub>3</sub> composite which was fabricated at various sintering temperatures, holding times, and a sintering pressure of 30 MPa has been discussed in the present research. Results show that the thickness of the reaction layer of the Ti-Al<sub>2</sub>O<sub>3</sub> interface was increased in exponential form in correspondence with the increase of the sintering temperature. Furthermore, according to analysis, the relationship between the thickness of the interface reaction layer, sintering temperature, and heat preservation time acquiring the kinetic equation of interfacial reaction of Ti/Al<sub>2</sub>O<sub>3</sub> composite was <i>d</i> = 182.5exp(−6.6 × 10<sup>4</sup>/<i>RT</i>)<i>t</i><sup>0.48</sup> by linear fitting.
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