Anti-radiation damage metal nanocrystalline/carbon nano tube composite material and preparation method thereof

Abstract

The invention belongs to the field of composite materials and anti-radiation damage structure materials, and particularly relates to an anti-radiation damage metal nanocrystalline/carbon nano tube composite material and a preparation method thereof. The composite material is composed of a self-supporting CNT matrix and metal nanocrystallines uniformly attached to the surface of the self-supportingCNT matrix to grow, adjacent nanocrystalline grains are in a small-angle tilting grain boundary with the orientation difference of 1-10 degrees, the grain size is smaller than or equal to 250 nm, andthe porosity is larger than or equal to 50%. The preparation method comprises the following steps that a sample support with bearing and heating functions is provided, and plasma cleaning treatment is carried out on the CNT substrate borne by the sample support under the heating condition; at the pressure (Ar gas) of 0.2-2 Pa and the temperature of 20-800 DEG C, the metal nanocrystalline/carbon nano tube composite material through the CNT prepared substrate by utilizing a magnetron sputtering deposition technology. The thickness, the composition, the porosity and the like of the composite material can be regulated and controlled correspondingly, high-density nano-scale pores are formed, relatively high electrical conductivity and bending flexibility are achieved, and under the irradiationof high-energy particles, good anti-damage property and structural stability are shown.

Description

technical field [0001] The invention relates to the field of composite materials and structural materials resistant to radiation damage, in particular to the structural design and preparation method of a composite material of porous metal nanocrystals and carbon nanotubes (CNT) with an ordered microstructure. The composite exhibits good radiation damage resistance and flexural toughness. Background technique [0002] Under the background of my country's current vigorous development of new high-efficiency nuclear power technology, it is of great significance to explore new structural materials for nuclear power reactors that are closely related to my country's national economic development, energy security and people's lives. Today's international society is undergoing an energy system revolution, the core of which is to gradually replace the traditional energy with fossil energy as the pillar with new energy and renewable energy as the mainstay, so as to realize the coordina...

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Problems solved by technology

This poses severe challenges to the high-temperature mechanical properties, thermal properties, radiation damage resistance and other physical, chemical and technical properties of materials. Today's engineering structural materials are difficult to meet such stringent requirements.

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