The effect of modification of matrix on densification efficiency of pitch based carbon composites

• 作 者: MOHAMMAD Mahdi Sotoudehnia ALI Khalife Soltani AMIR Maghsouipour FATOLLAH Moztarzadeh
• 机 构: Ceramic Department,Materials and Energy Research Center,Biomaterial Group,Faculty of Biomedical Engi
• 出 处: Journal of Coal Science & Engineering(China)
• 发表日期: 2010年04期
• 关键词: pitch prepare impregnation commercially suitability viscosity fractionation heat

Using coal tar pitch as a matrix precursor to prepare carbon materials is widelyused by impregnation/carbonization processing technology.Four different grades of coaltar pitch and a natural pitch were characterized in terms of carbon yield, density, viscosity,and fractionation with solvents, as well as by thermal analysis methods.The suitability ofthese commercially available matrices for densification of 3 dimensional carbon-carboncomposites was examined.The theoretical results compared with experimental results.The highest density after impregnation was obtained using one of the coal tar pitches.Thepredicted results are in reasonable agreement with experiment data.The significance ofthis research is that a special heat treatment regime was conducted.The effects of modificationtemperature on the densification efficiency of composites were investigated andthen structure and characteristics of the composites were determined by scanning electronmicroscopy (SEM), Transmission electron microscopy (TEM) and X-Ray Diffraction (XRD).

Using coal tar pitch as a matrix precursor to prepare carbon materials is widely used by impregnation / carbonization processing technology. Flow different grades of coal tar pitch and a natural pitch were characterized in terms of carbon yield, density, viscosity, and fractionation with solvents, as well as by thermal analysis methods. the suitability of the said commercially available matrices for densification of 3 dimensional carbon-carboncomposites was examined. the theoretical results compared with experimental results. highest highest after impregnation was obtained using one of the coal tar pitches. reasonable agreement with experiment data that the significance ofthis research is that a special heat treatment regime was conducted.The effects of modificationtemperature on the densification efficiency of composites were investigated andthen structure and characteristics of the composites were determined by scanning electronmicroscopy (SEM), Transmission electron mic roscopy (TEM) and X-Ray Diffraction (XRD).