| abstract |
The invention belongs to the technical field of gradient materials, and specifically provides a ZrB 2 -Mo gradient material and a preparation method, wherein the ZrB 2 -Mo gradient material comprises ZrB 2 -rich ceramics and Mo-rich metal layers at both ends, and a middle layer with gradient gradient components The ZrB 2 /Mo multi-layer composite material layer is prepared by sintering by an integral molding method; the gradient components in each of the ZrB 2 /Mo multi-layer composite material layers are designed by a function for component distribution. Compared with the homogeneous ZrB 2 /Mo composite, the ZrB 2 ‑Mo gradient material prepared by this scheme can better maintain the integrity and avoid catastrophic damage under the same ablation environment. The thermal stress caused by the difference in thermal expansion coefficient between metal materials greatly improves the resistance to thermal shock ablation. |