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借助ＳＥＭ、ＴＥＭ对激光熔覆ＴｉＣ／Ｎｉ＋Ｃｒ过程中陶瓷相ＴｉＣ的行为进行了研究。结果表明：未受基体中Ｆｅ扩散影响的熔覆层表层，ＴｉＣ仍保持为完整的六边形截面颗粒。交互扩散区的ＴｉＣ颗粒在凝固应力作用下可能产生裂纹。溶解促进裂纹的萌生和扩展。溶解后的陶瓷相与粘结相交互作用生成（Ｆｅ，Ｃｒ）２３Ｃ６。溶解后的陶瓷相在凝固过程中重新析出，析出的陶瓷相可使涂层强化。
By means of SEM and TEM, the behavior of TiC during laser cladding TiC / Ni + Cr ceramic was studied. The results show that TiC remains intact hexagonal cross-section particles without being affected by Fe diffusion in the matrix. TiC particles in the interdiffusion zone may crack under the effect of solidification stress. Dissolution promotes the initiation and propagation of cracks. The dissolved ceramic phase interacts with the binder phase to form (Fe, Cr) 23C6. The dissolved ceramic phase re-precipitated in the solidification process, the precipitation of the ceramic phase can make the coating strengthen.