碳化硼表面改性对石墨粘结强度的影响  

Influence of surface modification of boron carbide on bonding strength of graphite

作　　者：谢震宇[1] 徐建康[1] 王冉冉[1] 马昌[1] 史景利[1] XIE Zhen-yu XU Jian-kang WANG Ran-ran MA Chang SHI Jing-li(School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, Chin)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387

出　　处：《炭素》2016年第4期14-18,共5页Carbon

摘　　要：为了提高碳化硼在酚醛树脂粘结剂中的润湿性和界面结合能力,采用硅烷偶联剂对碳化硼粉体进行了表面改性。研究了工艺条件对表面改性的影响及改性碳化硼粉体增强酚醛树脂粘结剂对石墨粘结强度的促进作用,结果表明使用5wt%硅烷偶联剂经过120min改性的碳化硼疏水效果较好,使用其增强酚醛树脂粘结剂,可使石墨间剪切强度有一定提高,相比普通碳化硼粉体增强的粘结剂,剪切强度提高了6%左右。In order to improve the wettabilityof the boron carbide and interfaeeadhesion between phenolic resin and boron carbide, the silane coupling agent was applied to modify the surface of boron carbide particles. It was researchedtbe influence oftechnological conditionson surface modification of boron carbide and the effect of bonding strengtbon the phenolic resin adhesives reinforced by modified boron carbide.It found that the ]：~oron carbide with 5% silane coupling agentfor 120 minpossessed a betterhydrophobic property. Meanwhile, the shear strength increased by 6% compared with the adhesive reinforced by common boron carbide.

关 键 词：碳化硼 酚醛树脂 硅烷偶联剂 粘结剂 石墨 

分 类 号：TB332[一般工业技术—材料科学与工程]