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在真空条件下,将Ni和Al范加热到620℃,在1MPa压力下原位反应1h,然后再分别加热到750℃、950℃和1150℃、在5MPa的压力进行4h的扩散退火,制造出完全致密的Ni/Ni-Al金属间化合物微层板复合材料.复合材料中塑性的Ni层主要以微裂纹的桥联方式提高室温韧性.经1150℃退火生成的Ni3Al层同NiAl和Ni层界面结合非常牢固,可以有效地阻碍微裂纹的扩展,Ni3Al层可通过滑移与Ni层协调变形,使得复合材料在拉伸时显示出明显的应变强化和塑性流变,其平均的断裂强度和应变分别达到786MPa和12.8%.
Ni and Al were heated to 620 ° C under vacuum and reacted in situ at 1 MPa for 1 hour, then heated to 750 ° C, 950 ° C and 1150 ° C, respectively, and diffusion-annealed at a pressure of 5 MPa for 4 hours to produce Completely densified Ni / Ni-Al intermetallic compound microlayer plate composite material.The plastic Ni layer in the composite material mainly enhances the room temperature toughness by the microcrack bridging mode.The interface of Ni3Al layer and NiAl layer formed by annealing at 1150 ℃ The combination of very strong, can effectively hinder the expansion of micro-cracks, Ni3Al layer can be coordinated with the Ni layer by sliding deformation, making the composite material shows significant strain-hardening and plastic rheological rheology, the average breaking strength and strain Respectively up to 786MPa and 12.8%.