Method for in-situ synthesis of nano-diamond-reinforced iron-nickel-based composite material, material obtained through method and application of material

• Main Authors: ZHAO PEIPEI, LIU TENGFEI, ZHANG FAMING
• Format: Patent
• Language: Chinese; English
• Published: 16.02.2018
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for in-situ synthesis of a nano-diamond-reinforced iron-nickel-alloy-based composite material. The composite material is prepared from carbon nanotubes and iron-nickelalloy powder which serve as raw materials, and a preparation technique adopts a discharging plasma sintering technology. The carbon nanotubes are partially subjected to phase change to form nano-diamond under catalysis of the iron-nickel alloy powder and the effect of a direct-current pulsed electric field for discharging plasma sintering, the change ratio is 50-80%, and the carbon nanotubes andthe nano-diamond have the cooperative reinforcement effects of fiber reinforcement and particle strengthening in the composite material. Compared with the prior art, the cooperative reinforcement toughening effect is more excellent. The obtained iron-nickel-alloy-based composite material has higher hardness, strength and abrasion resistance and lower heat expansion coefficient than a pure iron-nickel alloy and can be widel