A metal frame toughened ceramic composite material and its preparation method and application

Abstract

The invention belongs to the technical field of abrasion-resistant materials and discloses a metal frame reinforced ceramic composite material and a preparation method and application thereof. An outer shell of the metal frame reinforced ceramic composite material is a reinforced metal frame, and a reinforcement composite block is arranged in an inner cavity of the outer shell. The preparation method includes that raw materials are subjected to mixing, pressing and liquid-phase sintering to obtain the metal frame reinforced ceramic composite material for preparing high-abrasion-resistance composite lining plates or high-abrasion-resistance composite roller sleeves. The method is low in production cost, crack sources resulted from sudden heating and cooling of ceramic particles and metal frame leakage can be avoided through temperature-controlled sintering and cooling, and the ceramic particles are controllable in volume fraction and distribution state. After subsequent thermal treatment, the high-abrasion-resistance composite lining plates or high-abrasion-resistance composite roller sleeves prepared from the metal frame reinforced ceramic composite material are high in performance, great in interface bonding and free of macroscopic defects such as holes, segregation, cracks and the like.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and in particular relates to a metal frame toughened ceramic composite material and a preparation method and application thereof. Background technique [0002] Metal-ceramic composite materials are multi-phase composite materials composed of one or more ceramic phases and metals or alloys. The purpose is to combine the high hardness, high temperature resistance, and good wear resistance of ceramics with the toughness and plasticity of metal substrates. , to effectively utilize the advantages of both. In recent years, the research on wear-resistant composite materials with toughened ceramic particles composed of metal matrix or alloy has made great progress. The toughening preparation methods are mainly casting infiltration method, powder metallurgy method, in-situ composite method, stirring casting method Four kinds. [0003] The composite material is prepared by casting infilt...

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Problems solved by technology

[0003] The composite material is prepared by casting infiltration method. Although the reinforcing phase can be distributed uniformly, the shape of the preform can be controlled, and it can be located at the designated position of the wear-resistant part, but when the wetting angle between the ceramic particles and the molten metal is greater than 90 degrees, the surface of the ceramic particles It needs to be activated and the process is complicated. In addition, in the casting infiltration process, there is also a high temperature molten metal in the cavity, and the temperature distribution and stress distribution of each part of the casting during the solidification process are not ideal; the advantage of the powder metallurgy method is that it can A variety of metals can be used as matrix materials, and the volume fraction of ceramics is controllable. The disadvantage is that the production process is complicated and the cost is relatively high. One or more high-hardness reinforcing phases are generated in situ in the interior, which can better realize the metallurgical combination with the toughened matrix, but the composite materials prepared by this method are prone to segregation and the volume fraction of the reinforcing particles in the internal structure is limited. The morphology of the synthesized reinforced particles cannot be fully and effectively controlled, and it is difficult to adjust during the preparation process; the composite material prepared by the stirring casting method is relatively brittle, and the ceramic particles are prone to agglomeration, and air is inhaled during the stirring process, resulting in the oxidation of the molten metal, thereby Affect the quality of the casting

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