• Baoyan Liang

      Articles written in Bulletin of Materials Science

    • Preparation of Ti3AlC2 by mechanically activated sintering of 3Ti/Al/2C/0.2Sn

      Baoyan Liang Mingzhi Wang Xin Han Qin Zhou Xin Li

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      The mechanically activated sintering process was adapted to synthesize titanium aluminum carbide (Ti3AlC2) at low temperature. A mechanically induced self-propagation reaction occurred by mechanical alloying of 3Ti/Al/2C powder mixtures. In addition to powder products, a large amount of rigor granules with a size of 0.5 ∼ 10 mm were produced. Fine powders containing Ti3AlC2, Ti2AlC and TiC were obtained. The granules composed of Ti3AlC2, Ti2AlC and TiC. Adding Sn may remove Ti2AlC and enhance the synthesis of Ti3AlC2. After Sn was added, the products only contained Ti3AlC2 and TiC. The Ti3AlC2 content of the powders and granules were 75 wt% and 88 wt%, respectively. The mechanically alloyed products were pressureless sintered at 900–1300°C for 2 h. Sintering of these products at 900 ∼ 1200°C yields samples containing over 95 wt% Ti3AlC2. The sintered powder compacts with high purity Ti3AlC2 had a fine organization. The lath Ti3AlC2 of the granules had a length of 10–20 𝜇m.

    • Fabrication and characterization of Ti3SiC2–SiC nanocomposite by in situ reaction synthesis of TiC/Si/Al powders

      Baoyan Liang Mingzhi Wang Xiaopu Li Yunchao Mu

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      The microstructure and mechanical properties of Ti3SiC2–SiC nanocomposite fabricated by in situ hot pressing (HP) synthesis process were studied. The results show that dense Ti3SiC2–SiC composite contained minor TiSi2 obtained by hot sintering at 1350°C for 1 h. The average grain size of Ti3SiC2 was 4 𝜇m in length, and the size of SiC grains is about 100 nm. With its fine microstructure, the Ti3SiC2–SiC nanocomposite shows good mechanical properties.

    • Combustion reaction of Ti–Al–C–N system

      Yunchao Mu Baoyan Liang

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      The combustion reaction of Ti–Al–C–N system was investigated by using Ti powders and one CN𝑥 precursor powder as reactant powder blends. The reactant powder blends ratio was adjusted to obtain different materials. The phase composition of the samples was investigated by X-ray diffraction (XRD). The microstructure of the samples was observed by scanning electron microscopy (SEM). The result showed that Ti2Al(C,N)–TiAl𝑥, AlN–Ti(C,N) and Ti3Al(C,N)2–TiC composites can be fabricated by changing the reactant powder blends ratio.

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