Glassy Carbon Coating Deposited on Hybrid Structure of Composite Materials

Archives of Metallurgy and Materials

B. Hekner¹  J. Myalski¹  A. Posmyk² 

[1] BIA?YSTOK UNIVERSITY OF TECHNOLOGY, FACULTY OF MECHANICAL DEPARTMENT 45 C WIEJSKA STR., 15-351 BIA?YSTOK , POLAND;SILESIAN UNIVERSITY OF TECHNOLOGY, FACULTY OF TRANSPORT DEPARTMENT OF AUTOMOTIVE VEHICLES SERVICE 8 KRASI?SKIEGO STR., 40-019 KATOWICE, POLAND

关键词: Keywords: hybrid composite;    glassy carbon;    ceramic foam;    solid lubricant;    wear;   

DOI  :  10.1515/amm-2016-0176

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

This paper presents a method of production metal matrix composites with aluminum oxide foam covered by glassy carbon layer used as reinforcement. The glassy carbon coating was formed for decreasing of friction coefficient and reducing the wear. In first step of technology liquid glassy carbon precursor is on ceramic foam deposited, subsequently cured and carbonated at elevated temperature. In this way ceramic foam is covered with glassy carbon coating with thickness of 2-8 μm. It provides desirable amount of glassy carbon in the structure of the material. In the next step, porous spheres with carbon coating are infiltrated by liquid matrix of Al-Cu-Mg alloy. Thereby, equable distribution of glassy carbon in composite volume is achieved. Moreover, typical problems for composites reinforced by particles like sedimentation, agglomeration and clustering of particles are avoided. Tribological characteristics during friction in air versus cast iron as a counterpart were made. Produced composites with glassy carbon layer are characterised by friction coefficient between 0.08-0.20, thus meeting the typical conditions for solid lubricants.

【 授权许可】

Unknown