The cohesion between aluminium and the interlayer is resulted from the metallic bond and the cohesion between the enamel and the interlayer is brought about by the ionic bond and covalent bond.

• 中间过渡层与金属铝的结合主要通过金属键来实现，中间过渡层与瓷釉层的结合主要是通过离子键和共价键来实现。