Research On A Method Of Multimaterial Arbitrary Distribution And Its Fundamentalapplication

Any substance in the world is composed of elements.Different elements and their different ways of combination make the substance have different mechanical,electrical,optical and other characteristics.With the diversification of people's demand for materials and their functions,people are actively exploring various ways to create new materials.While,the most essential problem is how to realize the redistribution and combination of material elements.For the above problems,this dissertation focuses on the research of multimaterial arbitrary distribution.The basic theory of realizing multimaterial arbitrary distribution was studied deeply and further applied in the fields of image forming,films and composites.For controllable distribution of multiple materials,a physical model of multimaterial arbitrary distribution was established as well as a deposition mathematical model of multiple materials based on topological transformation.The material distribution of cross-section of deposition body was analyzed through the model.Finally,the basic theory of the multimaterial arbitrary distribution was elaborated.Based on the basic theory,a new method of macro-manipulation of a large number of materials to achieve accurate distribution of multiple materials was proposed.The essence of this method is to transform the extremely difficult transverse distribution of multiple materials into a relatively simple longitudinal deposition problem through a special deposition surface.The realization process of multimaterial arbitrary distribution was further described in detail,and the acquisition method of the deposition surface was analyzed emphatically.The influence factors of arbitrary distribution error of multiple materials were analyzed,and the distribution error of materials was deduced.The results show that the material distribution technology can achieve high-precision material manipulation.For the application of multimaterial arbitrary distribution in image forming,the characteristics of color mapping and three-dimensional building module were analyzed,and the application of this module in simulating multimaterial distribution was discussed.The multimaterial distribution of macro and micro-scale images were simulated and analyzed.Based on the method of multimaterial distribution,the type,thickness and sequence of materials were designed.The deposition surface of landscape was prepared by sculpture technology,and the multimaterial distribution of the scenery image was achieved on the deposition surface based on the sublimation process of pigments;The substrate with cell complex morphology was prepared by cell spin coating,and the multimaterial distribution of the cell image was obtained on the cellsubstrate based on magnetron sputtering atomic deposition technology.The results showed that the multimaterial distribution of scenery and cell image was highly consistent with the target image.Based on the image processing technology,the material distribution error of cell image was analyzed.The results showed that the distribution had nano-scale material distribution accuracy.This verified the feasibility of multimaterial distribution technology in macro and micro-image forming.For the application of multimaterial arbitrary distribution in preparation of multimaterial films.The type,thickness and sequence of the deposition materials were designed.Radial gradient circle array film was prepared on patterned sapphire substrates(PSS).The morphology characteristics of the deposition body before processing were studied.The results showed that the as-prepared deposition body can well duplicate the substrate morphology resulting in uniform microstructures.The morphology,material distribution and crystal structure of different sections of deposition body were studied.The results showed the radial gradient distribution with near-linear change of component content and the consistency of radial gradient circles on cross section.The boundary conditions for patterning the multimaterial distribution were studied.In order to quantify the distribution of materials,a mathematical model of deposition structure was established,resulting in obtaining the profile function of each deposition layer,the width and area of materials on different sections of deposition body.The calculated distribution width of materials reached a minimum of 3.3 nm,which further verified the high accuracy of multimaterial distribution technology.In order to explore the application of the film,the hardness,modulus and potential distribution of the gradient film were studied in depth.The three characteristics showed good radial gradient distribution.Based on the regulation of material type,thickness and sequence,the diversity of material distribution was discussed.The concentric ring array film was prepared and characterized.The preparation and analysis of multimaterial films would lay a foundation for the application of multimaterial distribution technology in the corresponding field.For the application of multimaterial arbitrary distribution in preparation of composites,a physical model was established based on hot-pressing.The honeycomb structure of silicon carbide reinforced aluminium matrix composite was designed.The structure type,element content and forming process of the composite were analyzed.Based on the structural characteristics of composite,the corresponding high-precision laying powder platform and hot-pressing mould were designed and manufactured.Honeycomb composite was prepared by hot-moulding process.The results showed that the honeycomb distribution of materials was well obtained,which verified the feasibility of multimaterial distribution technology in the field of composites.