工艺参数对Ni-Cr合金与陶瓷界面组织性能的影响

Influences of firing parameters on properties and microstructure of Ni-Cr alloy and porcelain interface

通过改变烤瓷温度及烤瓷时间,研究了金—瓷界面的力学性能和微观组织的变化规律。结果表明,金—瓷界面反应非常复杂,金—瓷界面处的物相主要有SnO2,SnCr0.14Ox,AlNi3及KAlSi2O6的复合氧化物等。烤瓷工艺参数变化直接影响金—瓷界面反应产物种类、数量及分布,最终决定了金—瓷界面结合强度。在一定范围内,随烤瓷温度的提高和烤瓷时间的延长,反应层变宽,金—瓷界面由突变型界面转变为化合物型,对提高金—瓷界面结合强度将起到非常重要的作用。当采用烤瓷温度T=960℃,烤瓷时间t=2.5min时,金—瓷界面抗剪强度可达到42.7MPa。

The influence of altering firing temperature and time on the mechanical properties and microstructure of the meatal-porcelain interface were studied.The experimental results showed that the reaction in the metal-porcelain interface was very complicated, and the phases of metal-porcelain interface were mainly SnO2, SnCr0.14Ox, AlNi3, KAlSi2O6 composite oxides etc. The kinds, quantities and distributions of the interface reaction products were affected by vaviations of firing technological parameters changing, which finally determined bonding strength of metal-porcelain interface. In certain range, the interfical reaction layers widened and the mutant metal-porcelain interface changed into compound type as firing temperature increaseing and firing time prolonging, which played an important role in increasing metal-porcelain interface bonding strength. The bonding strength was 42.7 MPa with firing temperature of 960 ℃ and firing time of 2.5 min.