From inner to outside, the composite pipe consisted of alumina ceramic layer, metal transition layer, white cast layer, carbon atom diffusion layer and nodular cast iron layer.

复合管从里到外由氧化铝陶瓷层、金属过渡层、白口铸铁层、碳原子扩散层、球墨铸铁层组成。

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And indicated some special merits of microwave treatment of atom diffusion, transformation and composite design.

其中，微波将在原子扩散、结晶相变和复合材料设计中发挥特殊的优势。

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