Three-dimensional Expansion Of The Ceramic Grain Growth Simulation And Parallel

The physical properties of cerarnics are cIosely related to their microstructure suchas the grain scale, grain boundny, grain orientation, etc. It's helpful for the development.and aPplication of ceramic materials to find out the relationship betWeen microsmictureand macroscopical performance. Moreover, the microstufore of ceramics is not staticbut dynamic, therefore, it's necessary to study the grain growth kinetics Which has closerelation with the evollltion of ceramic microsmicthe. During the past 50 years, manyscholars had been stUdying the behavior of grain growh in different ways. The comPutersimulation of grain growh is also a hot topic.In this thesis, a three-dimensional model is proposed for the comPuter simulation of' grain growth in ceramics with ABO3 structuxe, which is developed with Microsoft VisualC++ and OpenGL. Both the qualitative pictures and the quamitative data, such as graingrowth kinetics eXPonent (aboul 1.8 in the early stage and 5.5 in the late stage of graingroWth) and the values of fractal dimension (about 2.6 in the early stage and 2.2 in thelate stage of grain groWth), show that the simulation work is in good agreement withexperimental results reported. In addition, a parallel computation method is proposed a'1daPplied to the ceramic grain simulation in the thesis, both qualitative and quantitativeresults are also discussed in the thesis.The thesis involves five chaPters. In chaPter l, the concepts of ceramicmicrostrUcture, the basic theory of grain growth kinetics, Monte Caro simulation modeland other computer simulation models are indoduced. In chaPter 2, not only someconcrete prob1ems about the three-dimensional simulation model of ceramic graingroWth such as the received forces of the ions in the grain, random orientation of gransand boundaxy problem, but also the design and development of simulation software arediscussed. In chaPter 3, the microstructural evollltion procedure of ceramic grain growthbased on the three-dimensional qualitative simulation pictWes and the quamitativesimulation results are reported. In chaPter 4, a parallel comPlltation method of ceramicgrain growth simulation is proposed and analyzed. After realizing it with multithread, wefind that the parallel comPlltation method is much better than the former sequentialcomputation method from the simulation results. In chaPter 5, some conclusions areremarked and something to be improved for the simulation is pointed out.