As electronic packaging develops in the direction of high thermal
conductivity, low coefficient of thermal expansion(CTE), small
size and light weight [1]. The CTE describes how the size of an
object changes with a change in temperature. Specifically, it measures
the fractional change in size per degree change in temperature
at a constant pressure. The application of conventional
electronic packaging materials, such as MoeCu or WeCu, demonstrate
poor welding and machining properties, high densities, and
not suited to use in aerospace and aviation fields; Kovar or Invor
have appropriate CTEs, but have some shortcomings of low thermal
conduction properties, affecting the material intensity and stability
[2e4]. Therefore, more and more attentions have been attracted in
the new electronic packaging materials to meet the requirements
for more hard working conditions.