Research On Microwave High-Throughput Preparation Technology Of Multi-Component Alloy Material

High-throughput preparation technology is an important part of material genome project.Only by breaking through the bottleneck of high-throughput preparation can the research and development rate be more efficient.Experimental throughput has become an important indicator for the research and development of a material,which determines the speed of new material research and development.Nowadays,material research and development in various countries is developing rapidly.If the number of experiments is small,it means that there is less data collected,which affects the efficiency of material research and development,that is,it means that the cycle is long,it is difficult to keep up with the rapid development of materials in the world.Therefore,with the increasing demand for new materials,high-throughput preparation technologies have emerged.Microwave sintering technology has become an important technical means for the preparation of high-quality new materials in the field of material preparation,especially in the preparation of powder metallurgy materials with a broad application space due to its characteristics of fast heating rate,high energy utilization rate,high heating efficiency and safety and no pollution.In this dissertation,a new method of preparing bulk materials by heating alloy powder with microwave special energy field is proposed,and it is applied to the regulation of multi-component alloy.The main purpose of the first stage of this study is to explore the direct absorption of microwave interface reaction by metal powders,successively through the interface reaction of metal powders,the interface reaction between metal powders and non-metal powders and the interface reaction between alloy powders to explore the interface reaction of microwave acting on different powders;and then explore the diffusion and homogenization of alloy powders in the microwave field by high-throughput microbeam fluorescence characterization technology.Finally,the reaction of microwave absorption at the interface of the powder after cold isostatic compaction is discussed by continuously optimizing the preparation process.And the distribution and regional evolution of the alloys before and after densification.In the second stage of this work,the research mainly focuses on the multicomponent alloy microwave honeycomb cavity microfabrication technology,through the design of the structure and material selection of the honeycomb metalbased cavity high-throughput sample preparation device;the study of discrete honeycomb cavity absorption response,to explore the honeycomb cavity substrate and powder interface reaction,the absorption reaction of the powder in the honeycomb and the study of the structural uniformity of the components in the honeycomb to establish the determination and preparation technology of the honeycomb cavity in microwave high-throughput preparation technology.On the basis of the first two process studies,the third stage of this work further discusses the multi-element alloy regulation research;from the multi-element alloy regulation design,each component and design gradient correlation,each hive microstructure distribution,each hive hardness distribution and each hive component-microstructure-hardness statistical mapping correlation to explore the applicability of the microwave high-throughput preparation technology developed in this study for the regulation of multi-element alloys.Finally,the advantages and disadvantages of microwave high-throughput preparation technology are synthesized,and the microwave high-throughput separation microsample manufacturing technology is preliminarily discussed;in this stage,the graphite cavity design of separation microsample,high-throughput separation microsample manufacturing system and the applicability of highthroughput micromanufacturing of graphite discrete cavity are preliminarily explored.A preliminary exploration was carried out for the microwave highthroughput preparation of independent bulk materials.Based on the results of the previous study,this work developed a highthroughput microwave sintering technology for the preparation of multi-component bulk materials,and explored the correlation between the composition,structure,and performance of the samples through high-throughput characterization technology,and applied this technology to the regulation and screening of multi-component alloys,clarified the details of various sintering conditions and processes in this technology,and the scope of use of alloy material ratio.It lays a foundation for the high-throughput preparation of other system materials by microwave in the future.Techniques have also been developed for high-throughput preparation techniques.At the same time,the design idea of hive chamber and separated graphite chamber is provided.