Effects of nano-AlN on phase transformation of low temperature
vitrified bond during sintering process
(1. Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China;
2. College of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China;
3. School of Environment and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China)
2. College of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China;
3. School of Environment and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China)
Abstract: The effects of nano-AlN and sintering temperature on bending strength and wear resistance of low temperature vitrified bond for diamond grinding tools were studied. Furthermore, the phase transformation during sintering process was investigated by means of thermo-gravimetric analysis (TG), differential thermal analysis (DTA) and X-ray diffraction (XRD). The results show that the higher bending strength and wear resistance of low temperature vitrified bond are obtained by adding nano-AlN in bonds and sintering at optimum temperature. Nano-AlN added in bonds promotes the crystallization during sintering process and refines the grain sizes of crystalline phase.
Key words: low temperature vitrified bond; nano-AlN; sintering; phase transformation