Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料制备及其性能研究

Zr-based amorphous alloys have been extensively investigated due to their excellent physical and chemical properties. However, their applications were severely constrained because of their room-temperature brittleness. Thus how to prepare Zr-based bulk metallic glasses with high room-temperature plasticity has notable significance for the theory and engineering application.In the present work, Zr-Al-Ni-Cu quaternary alloy system will be investigated. Zr-Al-Ni-Cu amorphous alloy powders were prepared by gas atomization technique and were coated by a dense Ni-P amorphous alloy by electroless plating. The Zr-Al-Ni-Cu/Ni-P bulk amorphous alloy composites with excellent properties were prepared by hot pressing the Zr-Al-Ni-Cu/Ni-P amorphous alloy composite powders under atmosphere condition. On the basis of above-mentioned results, the regularity of the effect of the melting heat on the thermal property and the crystallization of Zr-Al-Ni-Cu/Ni-P amorphous alloy composite powder would be disclosed. In addition, the optimal technological conditions for Zr-Al-Ni-Cu amorphous alloy powders coated by a dense Ni-P amorphous alloy through the electroless plating would be acquired. The removal mechanism of the oxide film and the mechanism of electroless plating of Ni-P amorphous alloy would be clarified. On the other hand, the optimal process conditions for Zr-Al-Ni-Cu/Ni-P bulk amorphous alloy composites by hot press molding would be determined. The mechanism of toughening and fracture, friction and wear, and corrosion of Zr-Al-Ni-Cu/Ni-P bulk amorphous alloy composites would be also clarified. It will impel the industrial application of the bulk amorphous alloy.

锆基非晶合金由于优异的物理化学性能受到广泛关注。然而，大部分锆基块体非晶合金表现出室温脆性，使其应用受到严重的制约。制备出室温塑性大的锆基块体非晶合金具有十分重要的理论意义和工程应用价值。本课题拟以Zr-Al-Ni-Cu合金体系为研究对象，采用雾化法制备非晶合金粉末，通过化学镀在粉末表面获得致密的Ni-P非晶合金镀层，在大气环境下通过热压方法制备Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料。通过研究熔化热对非晶合金粉末的热学性能及其晶化的影响规律、Zr-Al-Ni-Cu非晶合金粉末Ni-P非晶合金化学镀的最优工艺条件、Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料热压成型的最优工艺条件，阐明氧化膜的去除机制和Ni-P非晶合金化学镀机理以及Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料增韧和断裂以及摩擦磨损和腐蚀等方面的机理，推进块体非晶合金的工业化应用。

锆基非晶合金由于优异的物理化学性能受到广泛关注。然而，大部分锆基块体非晶合金表现出室温脆性，使其应用受到严重的制约。制备出室温塑性大的锆基块体非晶合金具有十分重要的理论意义和工程应用价值。本课题以Zr-Al-Ni-Cu合金体系为研究对象，采用雾化法制备了非晶合金粉末，通过化学镀在粉末表面获得致密的Ni-P非晶合金镀层，在大气环境下通过热压方法制备了Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料。通过研究熔化热对非晶合金粉末的热学性能及其晶化的影响规律、Zr-Al-Ni-Cu非晶合金粉末Ni-P非晶合金化学镀的最优工艺条件、Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料热压成型的最优工艺条件，阐明了氧化膜的去除机制和Ni-P非晶合金化学镀机理以及Zr-Al-Ni-Cu/Ni-P块体非晶合金复合材料增韧和断裂以及摩擦磨损和腐蚀等方面的机理，一定程度上推进了块体非晶合金的工业化应用。