2results about How to "Increased compressive yield strength" patented technology

This invention discloses a Cu@basalt fiber / porous aluminum composite material and its preparation method, belonging to the field of material preparation technology. The method of this invention utilizes diffusion between copper atoms on the surface of basalt fibers and aluminum atoms in the porous aluminum matrix to generate a metallurgical bonding interface, improving the interfacial bonding force. This results in a material with both high strength and high sound absorption properties, meeting the application requirements in sound absorption and noise reduction technologies. The obtained material has a porosity of 81.71%–83.38%, a pore size of 0.4 mm–0.5 mm, a basalt fiber volume fraction of 7 vol.%–8 vol.%, a fiber diameter of 20 μm–30 μm, and a fiber length of 1 mm–2 mm. The compressive yield strength of the in-situ diffusion metallurgically reinforced Cu@basalt fiber / porous aluminum composite material can reach 4.71 MPa–5.37 MPa, which is 5.4%–7.62% higher than that of basalt fiber / porous aluminum composite materials with the same porosity and pore size.

The present application relates to the field of graphene reinforced titanium alloy composite material, in particular to a preparation method of in-situ deposition three-dimensional network graphene reinforced titanium alloy composite material, which comprises the following steps: firstly, three-dimensional network graphene is in-situ deposited on the surface of porous titanium through chemical vapor deposition process; then, titanium alloy melt is filled into the porous preform by using high vacuum melt infiltration process, after a period of heat preservation treatment, finally, three-dimensional network graphene reinforced titanium alloy composite material is obtained by quenching. The three-dimensional network graphene reinforced titanium alloy composite material prepared by the present application has good interface combination and dense structure, by introducing graphene in the composite material, not only the load transmission effect is achieved, but also the part of TiC particles formed at the interface can make the crack deflect and hinder the crack propagation.