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首页> 外文会议>2006 BIMW >Effect of Mg Content in Matrix on Infiltration Height in Producing MgO/Al Composite by Vacuum Infiltration Method
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Effect of Mg Content in Matrix on Infiltration Height in Producing MgO/Al Composite by Vacuum Infiltration Method

机译：真空浸渗法生产MgO / Al复合材料中基质中Mg含量对浸渗高度的影响

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摘要

Vacuum infiltration is one of the composite production method. Reinforcement volume ratio, vacuum value, molten matrix composition and temperature, infiltration atmosphere and time are important parameters in infiltration of molten metal into preformed reinforcement. In this study, MgO powder and Al were used as reinforcement and matrix respectively. Mixture of MgO and Al powders with -105 μm particle size were filled in quartz tubes freely to form 30 % reinforcement volume ratio. Liquid pure Al with varying Mg contents were vacuum infiltrated into the MgO powder under 550 mmHg vacuum at two different temperatures in normal atmosphere for 3 min. After vacuuming, infiltration height and density of produced composite have been determined. Fracture behavior of composites has also been determined by three point fracture test. Microstructure of composites and fracture surface were investigated by SEM analysis. It has been found that fracture strength of composites decreased although infiltration height and density increased with increasing Mg content of liquid Al. It has been also determined that molten metal temperature facilitates infiltration.
机译：真空渗透是复合生产方法之一。钢筋体积比，真空值，熔融基质组成和温度，渗透气氛和时间是熔融金属渗透到预制钢筋中的重要参数。在这项研究中，MgO粉末和Al分别用作增强材料和基体。将粒径为-105μm的MgO和Al粉的混合物自由填充到石英管中，以形成30％的增强体积比。在正常气氛下，在两个不同温度下，在550 mmHg真空下，将具有不同Mg含量的液态纯Al真空渗入MgO粉末中。抽真空后，确定了所产生的复合物的渗透高度和密度。复合材料的断裂行为也已经通过三点断裂试验确定。用SEM分析了复合材料的微观结构和断口表面。已经发现，尽管渗透高度和密度随液态Al的Mg含量的增加而增加，但复合材料的断裂强度却降低了。还已经确定，熔融金属温度有助于渗透。

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