Friction and Wear Properties of Porous Carbon Materials made from Rice Hull at High Temperature

抄録

  The authors have investigated a new utilization of rice hull, which is one of the agricultural wastes in Japan. This utilization is significant from the viewpoint of recycling. The Rice hull silica carbon (RHSC) materials are manufactured through the procedure of mixing the rice hull particles with a phenol resin, pressure forming, drying, and then carbonizing in nitrogen gas atmosphere at high temperatures. Since rice hulls have the natural porous structure, the RHSC is manufactured as a porous carbon material. Previous research has revealed that this material showed certain properties of excellent friction and wear under the conditions of non-lubrication and seawater atmosphere. Then, this material is applied to slide members such as linear motion guide elements and sliding bearings. The basic properties in RHSC such as compressive strength and bending strength and friction and wear at normal temperature have been clarified. However, the effect of friction and wear at high temperature has not been clarified. In addition, when the material reaches a high temperature, the material tends to crack and oxidize on its surface. Therefore, in order to achieve the practical use of this material at high temperature, it is essential to evaluate the properties of friction and wear at high temperature. In this study, In order to grasp the effect of the temperature of the wear surface on the friction and wear properties of the RHSC, conducted to evaluate friction and wear properties at high temperature.