Abstract The preparation, microstructure and mechanical properties of ZTA particles reinforced Fe matrix composites (ZTAP/Fe composites) were systematically investigated. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) were used to analyze the microstructure and phase constituents, the hardness (H), Young's modulus (E) and plasticity factor (δA) were determined as well. The nickel-chromium double-layer coated ZTAP of core-shell structure was prepared by electroless plating and multi-arc ion plating technologies. The modified ZTAP is consisted of the α-Al2O3, t-ZrO2, α-Cr and γ-Ni phases. In addition, the compressive strength of ceramic preforms is high due to a compact sintering neck formed among ZTAP during high temperature sintering. The preferred sintering process for ZTA ceramic preforms is determined as 1350 °C + 1 h, in this case the preforms show the remarkable porosity and highest compressive strength which are 27.8% and 35.0 MPa, respectively. The interfacial metallurgical chemical reactions occurred during infiltration casting process, which ensure the excellent metallurgical interfacial bonding of the ZTAP/Fe composites. The interface contains double transition layers, which refer to silicate and CrFe phases, respectively. The H, E and δA of interfacial double transition layers were measured by the nano-indentation method, the values of which are situated between the ZTAP and iron matrix.

中文翻译：

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镍铬双层包覆ZTAP陶瓷增强铁基复合材料的显微组织和力学性能

摘要 系统研究了ZTA颗粒增强Fe基复合材料（ZTAP/Fe复合材料）的制备、微观结构和力学性能。采用X射线衍射（XRD）、扫描电子显微镜（SEM）和电子探针显微分析（EPMA）对显微组织和相成分进行分析，硬度（H）、杨氏模量（E）和塑性因子（δA）为也决定了。采用化学镀和多弧离子镀技术制备了核壳结构的镍铬双层包覆ZTAP。改性 ZTAP 由 α-Al2O3、t-ZrO2、α-Cr 和 γ-Ni 相组成。此外，由于高温烧结过程中 ZTAP 之间形成致密的烧结颈，陶瓷预制件的抗压强度很高。ZTA 陶瓷预制件的首选烧结工艺确定为 1350 °C + 1 h，在这种情况下，预制件显示出显着的孔隙率和最高的抗压强度，分别为 27.8% 和 35.0 MPa。熔渗铸造过程中发生界面冶金化学反应，保证了ZTAP/Fe复合材料良好的冶金界面结合。该界面包含双过渡层，分别指硅酸盐和 CrFe 相。通过纳米压痕法测量界面双过渡层的H、E和δA，其值位于ZTAP和铁基体之间。熔渗铸造过程中发生界面冶金化学反应，保证了ZTAP/Fe复合材料良好的冶金界面结合。界面包含双过渡层，分别指硅酸盐和 CrFe 相。通过纳米压痕法测量界面双过渡层的H、E和δA，其值位于ZTAP和铁基体之间。熔渗铸造过程中发生界面冶金化学反应，保证了ZTAP/Fe复合材料良好的冶金界面结合。该界面包含双过渡层，分别指硅酸盐和 CrFe 相。通过纳米压痕法测量界面双过渡层的H、E和δA，其值位于ZTAP和铁基体之间。