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首页> 美国卫生研究院文献>Materials >Titanium Carbide Nanofibers-Reinforced Aluminum Compacts a New Strategy to Enhance Mechanical Properties
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Titanium Carbide Nanofibers-Reinforced Aluminum Compacts a New Strategy to Enhance Mechanical Properties

机译：碳化钛纳米纤维增强铝粉一种提高机械性能的新策略

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摘要

TiC nanofibers reinforced Al matrix composites were produced by High Frequency Induction Heat Sintering (HFIHS).The titanium carbide nanofibers with an average diameter of 90 nm are first prepared by electrospinning technique and high temperature calcination process. A composite solution containing polyacrylonitrile and titanium isopropoxide is first electrospun into the nanofibers, which are subsequently stabilized and then calcined to produce the desired TiC nanofibers. The X-ray diffraction pattern and transmission electron microscopy results show that the main phase of the as-synthesized nanofibers is titanium carbide. The TiC nanofibers is then mixed with the aluminum powders and introduced into high frequency induction heat sintering (HFIHS) to produce composites of TiC nanofibers reinforced aluminum matrix. The potential application of the TiC nanofibers reinforced aluminum matrix composites was systematically investigated. 99.5% relative density and around 85 HV (833 MPa) Vickers hardness of the Al reinforced with 5 wt % TiC nanofiber has been obtained. Furthermore, the sample of Al contains 5 wt % TiC, has the highest value of compression and yield strength of about 415 and 350 MPa, respectively. The ductility of the Al/5 wt % TiC showed increasing with increasing the TiC contents.
机译：采用高频感应加热烧结法制备了TiC纳米纤维增强的Al基复合材料。首先通过电纺丝技术和高温煅烧工艺制备出平均直径为90nm的碳化钛纳米纤维。首先将包含聚丙烯腈和异丙醇钛的复合溶液电纺到纳米纤维中，然后将其稳定化，然后煅烧以生产所需的TiC纳米纤维。 X射线衍射图谱和透射电子显微镜结果表明，合成后的纳米纤维的主要相为碳化钛。然后将TiC纳米纤维与铝粉混合，并引入高频感应热烧结（HFIHS），以生产TiC纳米纤维增强的铝基复合材料。系统地研究了TiC纳米纤维增强铝基复合材料的潜在应用。已经获得了用5 wt％TiC纳米纤维增强的Al的99.5％相对密度和大约85 HV（833 MPa）的维氏硬度。此外，Al样品含有5wt％的TiC，具有最高的压缩值和屈服强度，分别为约415和350MPa。 Al / 5 wt％TiC的延展性随TiC含量的增加而增加。

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