喷射沉积SiCp/Al-Fe-V-Si复合材料梯温楔形压制工艺及致密化机理研究

SiC particle reinforced heat-resistant aluminum alloy composite has a broad applicationprospects in the aerospace. The applicant first prepared composite blank by multi-layer spray deposition, and pre-densed slab by Sequential Motion Compaction with Temperature Gradient (SMC-TG) process, then improved the formability of the blank, finally prepared uniform、small、excellent mechanical properties of the composite blank through subsequent processing. In this project, the applicant made a deep research of porous slab’s pore deformation, particle flow and deformation, fragmentation and dispersion of the oxide film, the metal flow and plastic deformation law, the mechanism of the densification in the process of SMC-TG; simulated SMC-TG process by finite element numerical simulation software, optimized the parameters of the SMC-TG process furtherly, then prepared uniform、small、excellent mechanical properties of the composite blank; and made a deep study on the microstructure and mechanical properties of the obtained large-size blank. This project is significant, which can improve and develop the theory on the deformation and densification mechanism of the porous composite slab, can be used for the preparation of heat-resistant aluminum alloy matrix composite blank and large-size blank especially which urgently needed by the aerospace , and also can be used for other composites.

SiC颗粒增强耐热铝合金复合材料在航空航天上有着广泛的应用前景，申请者通过多层喷射沉积制备复合材料坯料，再采用梯温楔形压制预致密坯料，改善坯料的成形性能，然后通过后续加工制备组织均匀细小、力学性能优良的复合材料。本项目主要是对多孔坯料在梯温楔形压制过程中的孔隙变形、颗粒流动与变形、氧化膜破碎及分散、金属流向和塑性变形规律、致密化的机理进行深入研究；并利用有限元数值模拟软件对压制过程进行仿真，进一步优化梯温楔形压制工艺的参数，制备出组织均匀细小、力学性能优良的致密材料；对制得的大尺寸材料的显微组织和力学性能进行深入研究。项目意义重大，可完善和发展多孔性复合材料的变形规律和致密化机理的理论，可用于航空航天急需的耐热铝合金基复合材料尤其是大尺寸材料的制备，也可用于其它复合材料的制备。

SiC颗粒增强耐热铝合金复合材料在航空航天上有着广泛的应用前景，项目“喷射沉积SiCp/Al-Fe-V-Si复合材料梯温楔形压制工艺及致密化机理研究”通过多层喷射沉积制备复合材料坯料，设计和改进梯温楔形压制设备，采用梯温楔形压制预致密坯料，改善坯料的成形性能，然后通过热轧加工制备组织均匀细小、力学性能优良的复合材料。本项目通过对多孔坯料在梯温楔形压制过程中的孔隙变形、颗粒流动与变形、氧化膜破碎及分散、金属流向和塑性变形、致密化规律的研究，得到了喷射沉积材料的致密化机理；并利用有限元数值模拟软件对压制过程进行仿真，进一步优化梯温楔形压制工艺的参数。项目意义重大，可完善和发展多孔性复合材料的变形规律和致密化机理的理论，可用于航空航天急需的耐热铝合金基复合材料尤其是大尺寸材料的制备，也可用于其它复合材料的制备。