真空中的扩散焊接是金屬及合金在高度真空中不加焊藥进行焊接的过程: 性質不同的物体接触时的扩散过程,是由于原子移动的距离超出了原子間的平均距离所引起。当固体金属及合金扩散焊接时,如果溫度低于两种接触成分的熔点,那末扩散元素的原子便渗入到溶質晶格的晶間中,或者置换晶格点陣上的原子、因而改变了它的性質。例如, Diffusion welding in vacuum is a process in which metals and alloys are welded without a welding agent in a high degree of vacuum: the diffusion of objects of different nature upon contact is caused by the movement of atoms beyond the mean distance between atoms. When solid metals and alloys are diffusion soldered, if the temperature is below the melting point of the two contact components, the atoms of the diffusing elements infiltrate into the intergranular space of the solute lattice or displace the atoms on the lattice lattice and thus change it The nature of E.g,