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_{1-x}Al

_{x}N Solid Solution Synthesized by High-Energy Milling

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# Thermal Decomposition of Supersaturated Ti_{1-x}Al_{x}N Solid Solution Synthesized by High-Energy Milling

## 摘要:

Supersaturated titanium-aluminum nitride (Ti_{1-x}Al_{x}N) is a very attractive material for a wide range of applications due to its high oxidation and wear resistance accompanied by high strength, hardness, thermal conductivity and thermal shock resistance. Currently, its applications are limited to coatings obtained by physical or chemical deposition. Bulk materials based on Ti_{1-x}Al_{x}N may be fabricated by powder metallurgy approach using powders synthesized by high-energy ball milling (HEBM), which composition corresponds to supersaturated Ti_{1-x}Al_{x}N solid solution. In the present study, thermal stability of the supersaturated Ti_{1-x}Al_{x}N solid solution was investigated. According to the quasi-binary TiN-AlN phase diagram, constructed using density functional theory (DFT) analysis, the concentration ranges, where decomposition takes place through spinodal decomposition or through nucleation and growth, were determined. Experimental study on thermal stability of solid Ti_{1-x}Al_{x}N solution powder was conducted by means of differential scanning calorimetry (DSC), Brunauer-Emmited-Teller (BET) and XRD. The results indicated that spinodal decomposition of Ti_{1-x}Al_{x}N starts at 800°C, while at temperature higher than 1300°C regular decomposition (nucleation and growth) is occur.

## 信息:

期刊:

编辑:

Graeme E. Murch, Irina V. Belova and Andreas Öchsner

页数:

82-89

DOI:

10.4028/www.scientific.net/DF.9.82

引用:

M. Radune et al., "Thermal Decomposition of Supersaturated Ti_{1-x}Al_{x}N Solid Solution Synthesized by High-Energy Milling", Diffusion Foundations, Vol. 9, pp. 82-89, 2016

上线时间:

October 2016

价格:

$35.00

允许: