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本研究工作建立了碳化钛粉末SHS过程的传热和传质方程组,应用数学变换和误差函数分析求解了一维传热和传质方程组,获得了关于燃烧波结构的数学模型。利用这个数学模型预测新的结果。 应用化学炉法(Chemical Oven)研究了碳化钛SHS过程的中间产物TiC_x的组成。TiC_(0.5)是SHS碳化钛粉末的中间化合物。 利用录像机、放像机和编辑机研究了(Ti+αC+βTiC)(α=0.5、1.0;β=0、0.05、0.10、0.15)系统的燃烧波蔓延的振荡特征,获得了最佳稀释度。 提出一种制备碳化钛微粉的新工艺:SHS化学炉法(SHS Chemical-Oven)。SHS-CO法的碳化钛粉末,粒子的平均尺寸<10μm,粒子的形貌为三枝纺锤形,具有分形特征,分形特征与二维集团-集团聚集生长过程的模拟结构类似。利用n体联合聚集生长模型建立了SHS碳化钛粒子尺寸演化过程的模型,模型结果与Merzhanov等人的实验值吻合,也与本研究的结果吻合。还探讨了SHS离心涂覆陶瓷衬里钢管的工艺。
In this work, the equations of heat and mass transfer for the SHS process of titanium carbide powder were established. One-dimensional heat and mass transfer equations were solved by mathematical transformation and error function analysis. The mathematical model of the combustion wave structure was obtained. Use this mathematical model to predict new results. Chemical Oven was used to study the composition of TiC_x, an intermediate of SHS. TiC_ (0.5) is an intermediate compound of SHS titanium carbide powder. The oscillation characteristics of the combustion wave propagating in the system of (Ti + αC + βTiC) (α = 0.5, 1.0; β = 0,0.05,0.10,0.15) were studied by video recorder, video player and editing machine, and the optimal dilution was obtained. A new process for preparing titanium carbide powder is proposed: SHS Chemical-Oven. SHS-CO method of titanium carbide powder, the average size of the particles <10μm, the particle morphology of three spindles, with fractal characteristics, fractal characteristics and two-dimensional group - group aggregation process similar to the simulated structure. The model of SHS titanium carbide particle size evolution was established by using n-body aggregate growth model. The model results agree well with those of Merzhanov et al. Also discussed SHS centrifugal coating ceramic lining steel pipe technology.