ZrC-C包晶固定点研制及评价

ZrC-C包晶固定点因其极高的名义相变温度(2882℃),超出了绝大多数高温加热炉的使用上限.通过改进自行设计的HT271型加热炉,使其工作温度上限提高到2900℃以上,满足了ZrC-C包晶固定点的使用要求.采用ZrC粉末和C粉末配置混合粉末,进行了ZrC-C包晶固定点的灌注和复现试验,共得到2组复现循环数据,其中第1...

The Development and Evaluation of the ZrC-C Peritectic Point

The ZrC-C peritectic fixed point has a very high nominal phase transition temperature(2882℃),which is higher than the upper limit of most high-temperature heating furnaces.By improving the self-designed HT271 heating furnace,the upper limit of its working temperature was increased to above 2900℃,which met the requirements of the ZrC-C peritectic fixed point experiments.ZrC powder and C powder were used to configure the mixed powder,and the filling and realizing experiments of the ZrC-C peritectic fixed point were carried out,two sets of realizing cycle data were obtained.The result of the first cycle is better:the inflection point temperature is 2882.298℃;the inflection point uncertainty is 26.3 mK.It has been verified that at a temperature above 2900℃,the improved HT271 heating furnace can be used for about 30 minutes stably.In order to extend the stable use time of the HT271 furnace at extremely high temperature,the next improvement plan is proposed.