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Al-B體系相之間相互轉(zhuǎn)化關(guān)系的研究
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國家重點基礎(chǔ)研究發(fā)展規(guī)劃(“973”計劃)(2011CB605904)


Phase Transitions of the Al-B System
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    摘要:

    采用DSC和傳統(tǒng)的粉末燒結(jié)法研究了Al-B體系的相轉(zhuǎn)化,并采用XRD分析了樣品物相組成,采用SEM分析了樣品微觀形貌,分析結(jié)果表明:燒結(jié)溫度對AlB2相的分解有決定性影響,同時,保溫時間對AlB2相的分解也有影響。在真空燒結(jié)條件下,要使AlB2相完全分解,1050 ℃下燒結(jié)3 h是最佳熱處理工藝。采用兩種單質(zhì)直接化合生成AlB12相的反應(yīng)是完全反應(yīng);即使是改變Al粉與?AlB12粉的比例,在900~1150 ℃范圍內(nèi)燒結(jié)樣品3 h,都不能使Al與?AlB12發(fā)生反應(yīng)。

    Abstract:

    The phase transitions of the Al-B system were systematically explored by means of DSC and traditional solid-state reaction. Phase and microstructures were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The results show that the sintering temperature plays a decisive part in the decomposition of AlB2. At the same time, holding time also has an important influence on the decomposition of AlB2. AlB2 can decompose completely at 1050 oC for 3 h using the vacuum sintering method. The formation reaction of AlB12 is a complete reaction. The reaction between Al and AlB12 can’t take place regardless of stoichiometric Al/B heated in the range of 900 to 1150 oC for 3 h.

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熊曉梅,楊 芳,王利軍,閆 果,王慶陽,劉國慶,馮建情,李成山,劉向宏,馮 勇. Al-B體系相之間相互轉(zhuǎn)化關(guān)系的研究[J].稀有金屬材料與工程,2014,43(8):1881~1885.[Xiong Xiaomei, Yang Fang, Wang Lijun, Yan Guo, Wang Qingyang, Liu Guoqing, Feng Jianqing, Li Chengshan, Liu Xianghong, Feng Yong. Phase Transitions of the Al-B System[J]. Rare Metal Materials and Engineering,2014,43(8):1881~1885.]
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  • 收稿日期:2013-09-08
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  • 在線發(fā)布日期: 2015-01-04
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