Abstract
The MAX phase Ti3SiC2 has broad application prospects in the field of rail transit, nuclear protective materials and electrode materials due to its excellent electrical conductivity, self-lubricating properties and wear resistance. Cu-Ti3SiC2 co-continuous composites have superior performance due to the continuous distribution of 3D network structures. In this paper, the Cu/Ti3SiC2(TiC/SiC) co-continuous composites are formed via vacuum infiltration process from Cu and Ti3SiC2 porous ceramics. The co-continuous composites have significantly improved the flexural strength and conductivity of Ti3SiC2 due to the addition of Cu, with the conductivity up to 5.73×105 S/m, twice as high as the Ti3SiC2 porous ceramics and five times higher than graphite. The reaction between ingredients leads to an increase in the friction coefficient, while the hard reaction products (TiCx, SiC) lower the overall wear rate (1×10−3 mm3/(N•m)). Excellent electrical conductivity and wear resistance make co-continuous composites more advantageous in areas such as rail transit.
Highlights
Ceramic/metal composites have excellent mechanical properties, electrical and thermal conductivity, as well as friction and wear properties
The ρcct is the theoretical density of co-continuous composites, ρpc is the density of porous ceramics, ρCu is the density of Cu, and υpc is the porosity factor of porous ceramics
The properties and structure of the Ti3SiC2 porous ceramic have an effect on the structure and properties of the metal–ceramic co-continuous composite
Summary
Ceramic/metal composites have excellent mechanical properties, electrical and thermal conductivity, as well as friction and wear properties. The three types of MAX phase compounds have common structural characteristics, that is, the A layer atoms (composed of IIIA or IVA group elements) separate the Mn+1Xn layer (composed of tightly stacked transition metal nitride or carbide) It has similar plasticity, workability, heat conduction, electrical conductivity with metal materials, and similar physical and chemical properties with ceramic materials, such as high strength, high modulus, high melting point, oxidation resistance, corrosion resistance, high temperature resistance, and excellent thermal shock resistance [20,21]. The ceramic/metal composite in this paper is obviously higher in wear resistance, it performs better in electrical conductivity prepared with the above two materials, and the preparation method of the metal/ ceramic composite material based on titanium silicon carbide ceramic and copper is simple in process, stable in material properties, and convenient for large-scale production
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
