摘要
考察了热压碳化硼 -碳化硼摩擦副在室温下的摩擦磨损特性 ,并采用 X射线衍射仪测定了磨损表面的物相组成 .结果表明 :碳化硼 -碳化硼摩擦副的摩擦系数随滑行距离和载荷的增加而减小 ,最低摩擦系数为 0 .0 9;在低载荷下初始阶段摩擦系数较高 (0 .3～ 0 .4) ,磨损率极低 ,无法用表面轮廓仪测得 .磨损表面 X射线衍射分析表明 ,在摩擦过程中接触表面发生了摩擦化学反应 ,生成了 B2 O3和 H3BO3等物质 ,从而使摩擦系数降低 .
The friction and wear properties of self-mated B4C under dry sliding in air were investigated on a ring-on-ring friction and wear tester. The worn surface of B4C was analyzed by X-ray diffraction to determine the phase of the worn surface. The results show that the friction coefficient decreases with the increase of the sliding distance and normal load. The lowest friction coefficient is 0.09, while the initial one ranges from 0.3 to 0.4. The tribochemical reaction between B4C and O2 is involved during the friction process with the generation of B2O3. The resultant B2O3 experiences the chemical reaction with the moisture in the air to form H3BO3, which is responsible for the decrease of the friction coefficient and wear rate.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2001年第3期214-217,共4页
Tribology
关键词
碳化硼
摩擦系数
磨损率
摩擦化学反应
摩擦副
Boron carbide
Ceramic materials
Friction
Hot pressing
Wear of materials
