Abstract
Element reaction–diffusion of Ti/Al2O3 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-Al2O3 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/Al2O3 composite was d = 182.5exp(−6.6 × 104/RT)t0.48 by linear fitting.
Highlights
Ti and its alloys have been widely used in the field of aerospace, vehicle engineering, and biomedical engineering because of their low weight, high toughness, and outstanding corrosion resistance [1,2,3]
Ti/Al2 O3 composite is expected to be able to combine the advantages of the metal and ceramic material and expand their application in some special circumstances such as high temperature, high pressure, and a corrosive environment [6]
The results showed that Ti reacted with Al2 O3 to form an interface layer of about
Summary
Ti and its alloys have been widely used in the field of aerospace, vehicle engineering, and biomedical engineering because of their low weight, high toughness, and outstanding corrosion resistance [1,2,3]. The interface reaction between Ti and Al2 O3 is easy to occur at high temperature while forming some brittle phases, such as TiAl and Ti3 Al, which have severely impacted their interface structure and mechanical properties [9,10]. To some extent, it restricts the application prospects of Ti/Al2 O3 composite in some fields. A model of interface reaction–diffusion of Ti/Al2 O3 composite was established from the angle element diffusion dynamics, we discussed the relationship of Ti-Al2 O3 reaction layer thickness between sintering temperature and soaking time. It was indispensable to realize the interface reaction between Ti and Al2 O3 could further guide us to select the appropriate inhibitor to restrict the interface reaction, improving the mechanical properties of Ti/Al2 O3 composite, which was the innovation and purpose of the present study
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