Endogenic intermetallic compound metal glass composite material and preparation method thereof

Abstract

The invention discloses an endogenic intermetallic compound metal glass composite material and a preparation method thereof. According to the invention, an atomic percent expression of components of the alloy is ZraTibCucNidBee, wherein a is not less than 30 and not more than 39, b is not less than 10 and not more than 12, c is not less than 6 and not more than 9, d is not less than 4 and not more than 8, e is not less than 32 and not more than 50, and a+b+c+d+e=100. A method for preparing the endogenic intermetallic compound metal glass composite material comprises the following steps of: selecting a block metal glass alloy system, and adjusting alloy components according to a phase selection principle so as to separate out an intermetallic compound phase in a condensation process; smelting the alloy components obtained in the first step to a mother alloy according to an electric arc smelting method; remelting the mother alloy, and carrying out gravity casting and copper mold suction cast so as to obtain a section bar; placing the section bar into a processed crucible, adopting induction smelting to a molten state, thermally insulating and quickly condensing in sequence so as to an as-cast endogenic composite material, wherein a second phase of the intermetallic compound is uniformly distributed on a metal glass substrate. According to the invention, the high intensity and the high hardness of the block metal glass are kept, and the room-temperature plasticity is greatly improved.

Description

technical field [0001] The invention belongs to metal matrix composite material technology, in particular to an endogenous intermetallic compound metal glass composite material and a preparation method thereof. Background technique [0002] Although bulk metallic glass (BMG) materials have high fracture strength and hardness and high elastic strain limit, since the plastic deformation of single-phase metallic glass is achieved by highly localized shear deformation, the shear that can be activated before fracture With a very limited number of bands, the BMG undergoes catastrophic brittle fracture without macroscopic plastic deformation at room temperature. Therefore, the problem of room temperature brittleness has developed into an important bottleneck for the application of BMG materials. [0003] In order to improve the room temperature brittleness of BMG materials, in 2000, the Johnson research group in the United States first prepared micron-sized β-Zr(Ti) solid solution...

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Problems solved by technology

[0004] Although the above-mentioned as-cast endogenous solid solution plasticized BMG composite material has a remarkable plasticizing effect, the strength of the plastic solid solution phase is much lower than that of the metallic glass matrix, resulting in a significant decrease in the strength of the composite material.

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