Thermomechanical Behavior of Bulk Ni/MWNT Composites Produced via Powder Metallurgy
Thermomechanical Behavior of Bulk Ni/MWNT Composites Produced via Powder Metallurgy
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DOI：
10.1002/adem.201200100
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发表时间：
2012-07
影响因子：
3.6
通讯作者：
S. Suárez;F. Soldera;C. G. Oliver;D. Acevedo;F. Mücklich
中科院分区：
文献类型：
--
作者：
S. Suárez;F. Soldera;C. G. Oliver;D. Acevedo;F. Mücklich
在50 ~ 1050℃范围内，研究了无压烧结和热单轴压制制备的多壁碳纳米管增强Ni基复合材料的热膨胀行为，并与纯Ni相比较。结果表明，MWNT与Ni基体之间存在积极的相互作用，在50 ~ 400℃之间将纯Ni的热膨胀系数（CTE）降低了76%。这种减少是由于基体与增强体之间的强界面相互作用以及纳米管的低本征CTE。这种优异的性能可能在低CTE要求的应用中非常有用，例如结构材料。
The thermal expansion behavior of Ni matrix composites reinforced with multiwalled carbon nanotubes (MWNT) fabricated by pressureless sintering and hot uniaxial pressing was studied in the range between 50 and 1050 °C and compared to that of pure Ni. The results show an active interaction between the MWNT and the Ni matrix by reducing the coefficient of thermal expansion (CTE) of pure Ni up to 76% between 50 and 400 °C. This reduction is due to the strong interfacial interaction between the matrix and the reinforcement and the low intrinsic CTE of the nanotubes. This outstanding behavior may be very useful in applications were low CTE is required as for example structural materials.