Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for coating crystalline flake graphite with boron carbide through in-situ reaction
The invention discloses a method for coating crystalline flake graphite for a high-thermal-conductivity titanium material with boron carbide through an in-situ reaction, and belongs to the field of research of metal-based composite materials. The carbon material crystalline flake graphite has the characteristics of excellent thermal conductivity, low density and the like, and is expected to improve the thermal conductivity of the titanium material. However, in the high-temperature preparation process, a titanium substrate is prone to reacting with graphite to generate an over-thick titanium carbide layer, and the overall heat conductivity of the composite material is seriously affected. The surface of crystalline flake graphite is coated with a boron carbide layer with a certain thicknessand then is compounded with titanium, so that the generation of a titanium carbide layer can be effectively prevented, and the thermal conductivity of the finally prepared material is improved. The method for coating the surface of crystalline flake graphite with boron carbide through the in-situ reaction is characterized in that uniform coating of the surface of crystalline flake graphite with the boron carbide layer can be achieved through a powder metallurgy technology with the help of Cu, the thickness is controllable, and the problems that materials and residues are separated, the thickness is difficult to control, and the coating layer is prone to peeling off in salt bath, magnetron sputtering and other methods can be effectively solved.
一种高导热钛材用鳞片石墨原位反应包覆碳化硼的方法，属于金属基复合材料研究领域。碳材料鳞片石墨以其优异的导热性以及密度低等特点可有望提高钛材的导热率。但是在高温制备过程中，钛基体容易与石墨发生反应生成过厚碳化钛层，严重影响复合材料整体热导率。将鳞片石墨表面包覆一定厚度的碳化硼层再与钛进行复合，可有效阻止碳化钛层的生成，从而提高最终所制备材料的导热率。本发明提出了一种在鳞片石墨表面原位反应包覆碳化硼的方法，即通过粉末冶金方法，借助于Cu，可实现鳞片石墨表面碳化硼层的均匀包覆，并且厚度可控，可有效解决盐浴、磁控溅射等方法存在的物料与残渣分离、厚度难以控制、镀层易剥落等问题。
Method for coating crystalline flake graphite with boron carbide through in-situ reaction
The invention discloses a method for coating crystalline flake graphite for a high-thermal-conductivity titanium material with boron carbide through an in-situ reaction, and belongs to the field of research of metal-based composite materials. The carbon material crystalline flake graphite has the characteristics of excellent thermal conductivity, low density and the like, and is expected to improve the thermal conductivity of the titanium material. However, in the high-temperature preparation process, a titanium substrate is prone to reacting with graphite to generate an over-thick titanium carbide layer, and the overall heat conductivity of the composite material is seriously affected. The surface of crystalline flake graphite is coated with a boron carbide layer with a certain thicknessand then is compounded with titanium, so that the generation of a titanium carbide layer can be effectively prevented, and the thermal conductivity of the finally prepared material is improved. The method for coating the surface of crystalline flake graphite with boron carbide through the in-situ reaction is characterized in that uniform coating of the surface of crystalline flake graphite with the boron carbide layer can be achieved through a powder metallurgy technology with the help of Cu, the thickness is controllable, and the problems that materials and residues are separated, the thickness is difficult to control, and the coating layer is prone to peeling off in salt bath, magnetron sputtering and other methods can be effectively solved.
一种高导热钛材用鳞片石墨原位反应包覆碳化硼的方法，属于金属基复合材料研究领域。碳材料鳞片石墨以其优异的导热性以及密度低等特点可有望提高钛材的导热率。但是在高温制备过程中，钛基体容易与石墨发生反应生成过厚碳化钛层，严重影响复合材料整体热导率。将鳞片石墨表面包覆一定厚度的碳化硼层再与钛进行复合，可有效阻止碳化钛层的生成，从而提高最终所制备材料的导热率。本发明提出了一种在鳞片石墨表面原位反应包覆碳化硼的方法，即通过粉末冶金方法，借助于Cu，可实现鳞片石墨表面碳化硼层的均匀包覆，并且厚度可控，可有效解决盐浴、磁控溅射等方法存在的物料与残渣分离、厚度难以控制、镀层易剥落等问题。
Method for coating crystalline flake graphite with boron carbide through in-situ reaction
一种鳞片石墨原位反应包覆碳化硼的方法
REN SHUBIN (Autor:in) / ZHAO YANG (Autor:in) / CHEN ZHENRUI (Autor:in) / QU XUANHUI (Autor:in)
02.06.2020
Patent
Elektronische Ressource
Chinesisch
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