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首页> 外文期刊>Advanced Science Letters >Study on the SiC/Al Composite Prepared by Pressureless Infiltration
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Study on the SiC/Al Composite Prepared by Pressureless Infiltration

机译：无压浸渗法制备SiC / Al复合材料的研究

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摘要

In order to obtain SiC/Al composites reinforced with high volume fraction, In this paper, double size distribution SiC powders with different size ratios were used to prepare the SiC preforms by self-oxidation bonding at low temperature, liquid aluminum alloy spontaneous infiltration into the SiC preforms which were putted in the crucible furnace filled with nitrogen gas. SiC/Al composites with different SiC particle sizes and different SiC volume fractions were successfully achieved by pressureless infiltration routine. The composition, micro-structure and micro-morphology of SiC/Al composites were analyzed by optical microscope (OM), scanning electron microscope (SEM), energy dispersion spectrometer (EDS) and X-Ray diffraction (XRD). The effects of SiC volume content on the mechanical and thermal properties of the composites were also examined. When the content of Fe(NO_3)_3 was 10 wt%, the volume fraction of SiC preform was 60%, the flexural strength of the SiC/Al composite reached 380 MPa, and the thermal conductivity was 123 W·m~(-1)·K~(-1).
机译：为了获得高体积分数增强的SiC / Al复合材料，本文采用不同尺寸比的双倍尺寸分布SiC粉在低温下通过自氧化结合，液态铝合金自发渗入制备SiC预制棒。将SiC瓶坯放入装有氮气的坩埚炉中。通过无压渗透程序成功地获得了具有不同SiC粒度和不同SiC体积分数的SiC / Al复合材料。用光学显微镜（OM），扫描电子显微镜（SEM），能谱仪（EDS）和X射线衍射仪（XRD）分析了SiC / Al复合材料的组成，微观结构和形貌。还研究了SiC体积含量对复合材料机械性能和热性能的影响。当Fe（NO_3）_3的含量为10 wt％时，SiC预制坯的体积分数为60％，SiC / Al复合材料的弯曲强度达到380 MPa，导热系数为123 W·m〜（-1 ）·K〜（-1）。

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