aluminum-tantalum | 121339-47-7

• 分子结构分类: 有机化合物
• 英文名称: aluminum-tantalum
• 英文别名: tantalum-aluminum；Aluminium--tantalum (1/1)；alumane;tantalum
• CAS: 121339-47-7
• 化学式: AlTa
• 分子量: 207.929
• InChiKey: RVSGESPTHDDNTH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.19
• 重原子数：
  2
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  氢化铝 、 钽 以 melt 为溶剂， 生成 aluminum-tantalum
  参考文献：
  名称：

  快速凝固的 Al-Ta 和 Al-Ta-V 合金中的非晶相和结晶相

  摘要：

  摘要 为了检验这些体系形成准周期或非晶相的能力，已经通过快速凝固制备了成分对应于复杂结晶相的 Al-Ta 和 Al-Ta-V 合金。根据透射电子显微镜研究，快速凝固的合金显示出结晶相以及具有高 Ta 含量的非晶相。对研磨样品进行的 TEM 观察表明，在机械研磨下，晶相转变为纳米晶结构。

  DOI：

  10.1016/j.jallcom.2006.08.131

文献信息

• Effect of aluminum on hydrogen absorption kinetics of tantalum
  作者：Manju Taxak、Nagaiyar Krishnamurthy

  DOI：10.1016/j.jallcom.2014.10.064

  日期：2015.2

  The isothermal hydrogen absorption kinetics of Ta1-zAlz alloys (z = 0, 1, 1.6 and 2.4 atom%) has been investigated in the temperature range of 673-973 K. The reacted fractions of hydrogen as well as reaction rate constant have been determined from time dependent hydrogen absorption curves using pressure drop method. The variation in rate constant with respect to temperature has been observed for all the alloys. Three-dimensional diffusion processes seems to be the intrinsic rate limiting step of hydrogen absorption. The apparent activation energy of hydrogen absorption has been calculated using Arrhenius equation. With increasing aluminum concentration, the hydrogen absorption kinetics slows down. Consequently, the rate constant decreases and the apparent activation energy of hydrogen absorption increases. The apparent activation energy of hydrogen absorption increases from 53.7 to 57.7 kJ/mol with increasing Al concentration from 0 to 2.4 atom% in tantalum. (C) 2014 Elsevier B.V. All rights reserved.
• Formation of Ta–Al intermetallics by combustion synthesis involving Al-based thermite reactions
  作者：C.L. Yeh、H.J. Wang

  DOI：10.1016/j.jallcom.2009.10.203

  日期：2010.2

  Thermite-based combustion synthesis was conducted to investigate in situ formation of tantalum aluminides (Ta2Al, TaAl, TaAl2, and TaAl3) and Al2O3 from the powder compacts of Al and Ta2O5 under a molar ratio ranging from Al/Ta2O5 = 13/3 to 28/3. Effects of the sample stoichiometry on the combustion behavior and degree of phase conversion were studied. Experimental evidence showed that upon ignition, the synthesis reaction proceeded in a self-sustaining manner featuring a planar combustion front or two localized reaction zones traveling spirally. The combustion front temperature varies between 1135 and 1460 degrees C. In agreement with composition dependence of the reaction exothermicity, the reaction front velocity in the axial direction increased from 5.8 to 7.2 mm/s with molar ratio of Al/Ta2O5 from 13/3 to 16/3, beyond which the flame velocity decreased substantially. The slowest reaction front with an axial velocity of 1.15 mm/s was observed in the sample of Al/Ta2O5 = 28/3. Based upon the XRD analysis, in situ formation of the composites composed of Al2O3 and tantalum aluminides was confirmed. For the samples with Al contents of Al/Ta2O5 = 13/3-18/3, an increase in the Al/Ta2O5 ratio improved the production of tantalum aluminides and caused the change in the dominant aluminide phase from Ta2Al, TaAl, to TaAl2. Due to lack of adequate reaction time, the phase conversion was not stoichiometrically achieved in the samples of Al/Ta2O5 = 13/3-18/3. However, it was found that the slower reaction front provided longer reaction time to complete the phase conversion almost stoichiometrically in the samples of Al/Ta2O5 = 22/3-28/3, which yielded the Al-rich phases TaAl2 and/or TaAl3 in the final products. (C) 2009 Elsevier B.V. All rights reserved.