| With rapid development of scientific technology, material is put forward update and higher requirements, such as the structure with super light-duty, best configuration design and structure more with functiona. Traditional metal, ceramic material has been difficult to satisfy the new high-tech times on the material all-round performance requirements. Therefore, lots of advanced composite materials with new structure are appeared such as metal matrix laminated plates composite, advanced composite material of grid structure, honeycomb sandwich structure composites, network ceramic/metal composite materials, Monolithic Ceramic Reinforcement. In the material field, using the latest materials research achievements and the latest materials preparation technology, seeking advanced materials with special structure and exploring excellent performance advanced materials has become the focus research.Based on the Spark Plasma Sintering (SPS) technology, the 3D micro cellular structure of metal/ceramic system is constructed. From the angle of micromechanics, the relationship of microstructure and the mechanical properties was studied. Al90Mn9Ce1/Al2O3 (TiO2, SiO2, ZrO2, SiC, CNTs), Fe76Si9B10P5/Zn0.5 Ni0.5 Fe2O4 (Co0.5 Ni0.5 Fe2O4) metal/ceramic nanocomposites were prepared by SPS. The microstructure of samples and characteristic of the micro-cellular structure were investigated via XRD, SEM. Al90Mn9Ce1/Al2O3 metal/ceramic composite as emphases, microstructure of the interface was observed by TEM. Micro-temperature area of Al90Mn9Ce1 matrix was simulated through ANSYS. In the macro lower temperature sintering mechanism was analyzed. The antioxidant propertie of Al90Mn9Ce1/Al2O3 is measured by DSC, while compressive strength.of the sample were measured. Based on representative volume element model, compression process of Al90Mn9Ce1/Al2O3 with different content of Al2O3 was simulated by ABAQUS. For Fe76Si9B10P5/Zn0.5Ni0.5Fe2O4 sintering samples, magnetic property was measured via Vibrating sample magnetometer, but also microhardness and compressive strength were measured.The SEM results indicate that three dimension micro-cellular structure with micro-nano scale of metal/ceramic system is constructed successfully and ceramic component present continuous close reticulation nanocyte structure,while alloy is closed in ceramic nanocyte to be discrete phase, and alloy closed micro was sealed in ceramic micro cellular become divided phase. Al90Mn9Ce1 has good wetting, alumetizing and diffusion for Al2O3 from TEM. The combination of interfaces between Al90Mn9Ce1 alloy and Al2O3 sintering phase is well. During SPS process, a fast diminishing temperature field from the surface to the core of the particle is formed, so the temperature of surface is high which can satisfy sintering of the ceramic, while much lower temperature of the core can guarantee the metal alloy from melting and maintain material metastable. Al90Mn9Ce1/Al2O3 has excellent oxidation resistance and mechanical properties from DSC and compression. And the results by ABAQUS indicate that the maximum compressive strength increases with the addition wall thickness. Fe76Si9B10P5/Zn0.5Ni0.5Fe2O4 have excellent soft magnetic and mechanical properties from the relevant experiment.This paper provides support of theoretical and methods for construction of microstructure, selection of component and more function of metal/ceramic system, but also it opens a new point of view for metal/ceramic system nanocomposite materials into a deeper study. |
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