关键词: 陶瓷/青铜结合剂;烧结温度;显微结构;力学性能

Abstract: Ceramic/bronze composite bond was prepared by the method of powder metallurgy, and mass ratio of bronze bond (mCu∶mSn=85∶15) to ceramic bond of 3∶1.The influence of sintering temperature on the mechanical properties and structure of ceramic/bronze composite bond were studied though electro-mechanical universal testing machines, rockwell hardness tester, scanning electron microscope (SEM) and X-ray diffraction.The results show that: when sintering temperature arises, the density, bending strength and impact strength of ceramic/bronze composite bond arises first and decreases later.when sintering temperature is 620 ℃, the mechanical properties of ceramic/bronze composite bond reach its maximum, the density is 5.43 g/cm3, the bending strength is 170 MPa, the impact strength is 9.76 kJ/m2 and the hardness (HRB) is 126.The temperature rise promotes Cu and Sn to realize alloyed and also promotes the interaction of the elements of the interface between the bronze and the ceramic.When sintering temperature is 620 ℃, between the copper and tin are all α+δ eutectoid, the interface of metal and ceramic bonded well, which improve the properties of ceramic/bronze composite bond.

Key words: Ceramic/bronze composite bond was prepared by the method of powder metallurgy, and mass ratio of bronze bond (mCu∶mSn=85∶15) to ceramic bond of 3∶1.The influence of sintering temperature on the mechanical properties and structure of ceramic/bronze composite bond were studied though electro-mechanical universal testing machines, rockwell hardness tester, scanning electron microscope (SEM) and X-ray diffraction.The results show that: when sintering temperature arises, the density, bending strength and impact strength of ceramic/bronze composite bond arises first and decreases later.when sintering temperature is 620 ℃, the mechanical properties of ceramic/bronze composite bond reach its maximum, the density is 5.43 g/cm3, the bending strength is 170 MPa, the impact strength is 9.76 kJ/m2 and the hardness (HRB) is 126.The temperature rise promotes Cu and Sn to realize alloyed and also promotes the interaction of the elements of the interface between the bronze and the ceramic.When sintering temperature is 620 ℃, between the copper and tin are all α+δ eutectoid, the interface of metal and ceramic bonded well, which improve the properties of ceramic/bronze composite bond.