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| 1 | Reaction procedure of a graphite fiber reinforced Ti-Al composite produced by squeeze casting-in situ reaction显示文摘The in situ reaction procedure and microstructure evolution of a graphite fiber reinforced Ti-Al composite (Grf/Ti-Al) was investigated, and the stability of TiAl3 at high temperature was discussed. As-cast material was prepared by pressing molten pure aluminum into a preform, which was composed of titanium particles and graphite fibers. The in situ reaction procedure of the as-cast material was investigated by differential scanning calorimetry (DSC), and phases in the products were detected by X-ray diffraction (XRD). Experimental results showed that TiAl3 was formed first. With an increase in temperature, TiC and Al4C3 were observed, but TiAl3 decreased. In the final product, Al2O3 and TiO2 were observed. It was considered that the previous forming TiAl3 decomposed, then TiC precipitated, and subsequently, oxidation resulted in the formation of Al2O3 and TiO2. | WU Gaohui LIU Yanmei XIU Ziyang JIANG Longtao YANG Wenshu | 2010 | Rare Metals2010，29，1： | 2 |
| 2 | TiAl-Nb合金相平衡转变及显微组织结构研究显示文摘采用定性定量衍射检测和金相检测法分析了Ti-Al和Ti-Al-Nb合金中的物相组成和显微组织结构特征,研究Nb元素的添加对Ti-Al-Nb合金物相组成、晶粒尺寸和分布等特征的作用和影响。结果表明,Nb元素能够促进合金结构中β相和α_2相的稳定性,抑制α相的生成和γ相的析出,扩展了α_2+γ两相区并使得γ相区右移。另外,Nb元素的添加在特定的成分范围内细化了合金的晶粒。 | 方春梅 徐勇 许斌 袁乃强 | 2018 | 山东科学2018，31，1： | 1 |
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