In the process of alloy melt and infiltrate the boron carbide , reaction between the boron carbide and aluminum interface occur , the key of achieving a good interface bond is the control of the reaction between the boron carbide and aluminum interface 研究表明，在熔融铝润湿碳化硼预制体并向碳化硼预制体中浸渗的过程中，取得良好界面结合的关键是保证在预制体达到完全浸渗前不发生过度的界面反应。
The researches indicate that after a heat treatment at high temperature ( 1700 ? ) , the chemistry properties of the boron carbide surface are changed . the new boron carbide surface , react weaker with aluminum , thus a better infiltration can be achieved 碳化硼预制体经高温预烧后，碳化硼表面化学状态发生改变，预烧后形成的碳化硼新表面与铝的反应活性降低，从而保证在本文工艺条件下浸渗过程的顺利进行。
The technique of producing metal matrix composite include powder metallurgy , casting ( including stirring casting process , in situ contact reaction process , liquid - phase metal infiltration process , co - spray deposition forming process ) , reaction mechanic alloying process 制备金属基复合材料的工艺分为粉末冶金法、铸造法(铸造法细分为搅拌铸造法、原位接触反应法、液相浸渗法、共喷射沉积法) 、反应机械合金化技术。
But its using has been limited because of the complex manufacture technology and high costing . so it will be good for expanding this composite using and have good social and commercial benefits , if wecan find out a simple technology to manufacture mosi2 / sic composite 直接浸渗法制备mosi _ 2 sic复合材料时，具有工艺简单，浸渗时保持预型件形状和尺寸基本不变的独到优点，这对于该材料的实用化具有十分重要的理论和实际意义。
The simulation results conform with the test results , which certificate the model . the liquid infiltration - extrusion process is simulated lively by the superiority and powerful nonlinear solution function of the fem software , the perfect contours and curves are obtained 并且利用有限元软件的优越性和强大的非线性求解功能，对液态浸渗挤压过程进行了很好的模拟，利用软件完善的后处理功能，得到了完美的等值线和带状云图。
The microstructure of the composites have been investigated by using a series of techniques , such as om , sem , xrd , xps , etc . the mechanical properties of the composites have been tested . in addition , the effects of the microstructure on the mechanical properties have been studied 因预制体成型在先，自发浸渗在后，所制得的试样保持了预制体的形状和尺寸，熔体自发浸渗技术是将复合材料制备和成型加工合为一体的特殊技术。
During the temperature fields , the results indicate that the processing parameters such as the extrusion velocity , casting temperature , perform preheating temperature , die preheating temperature and so on are important for the temperature fields besides the dwell time . they are must be in concordance each other to the deforming zone is in the quasi - solid state , and the stable semi - solid extrusion is implemented . during the deforming fields , the hyperbolic sine thermo - rigid - viscoplastic fem model is selected according to the forming feature of the process , and the variations of the stress - strain fields are studied 在温度场的模拟中，模拟结果表明，保压时间是影响制件成形质量的关键因素之一，挤压速度、液态金属浇注温度、预制体预热温度和模具预热温度等工艺参数对温度场的影响也很大，需进行参数之间的协调，只有当变形区内部始终维持准固态时，才能实现稳定的液-固挤压成形过程；在变形场的模拟中，根据液态浸渗挤压的成形特征，选用了双曲正弦刚-粘塑性有限元计算模型，研究了变形过程中应力应变场的变化规律，研究了模角对变形和金属流动的影响及变形力的变化过程和其影响因素。
The system of vpi equipment mainly includes vacuum chamber , heating unit , worktable with its drive unit , vacuum pumping unit , gas - charge unit and control unit , etc . this equipment would meet the need of al or cu matrix composites prepared by pressureless infiltration or vacuum infiltration in a high vacuum or special atmosphere 该设备主要出密封罐、加热系统、升降工作台、真空系统、充气系统、控制系统及密封罐水冷系统等组成。可以实现常见金属基复合材料在较高真空或特定气氛下的无压浸渗或真空浸渗制备工艺，并可实现试样的不同冷却方式凝固。
