Nanocomposite TiC-TiB2 Powders by SHS through Metastability Approach

Dario Vallauri; Y. López; Bruno DeBenedetti; Ignazio Amato

doi:10.4028/www.scientific.net/AST.45.1005

Paper Titles

Sinterable SHS Powders - Illustrative Examples of the State-of-the-Art
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Mechanical Activation as a New Method for SHS
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Combustion Synthesis of α-Si₃N₄ Powder under Low Nitrogen Pressure
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Recent Advances in Synthesis and Densification of Nanomaterials in Self-Propagating High-Temperature Regime
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Nanocomposite TiC-TiB₂ Powders by SHS through Metastability Approach
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Experimental Study on SHS under High Nitrogen Pressure
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Self-Propagating High-Temperature Synthesis of Dense TiC-TiB₂-MeO Ceramics
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Self-Propagating High-Temperature Synthesis of Carbide- and Boride-Aluminides
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Synthesis Mechanisms of the Combustion Synthesis of IntermetCers Composites
p.1029

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 45Nanocomposite TiC-TiB2 Powders by SHS through...

Nanocomposite TiC-TiB₂ Powders by SHS through Metastability Approach

Abstract:

The aim of this work is the achievement of nanostructured TiC–TiB2 powders through a metastability approach based on the Self–propagating High–temperature Synthesis (SHS) process followed by quench to obtain highly metastable powder agglomerates. An optimisation of the reaction stoichiometry was carried out in order to obtain products with approximately eutectic composition (i.e. 67%mol TiC – 33%mol TiB2). An optimized amount of sodium borate was used as gasifying additive to produce dispersed nanostructured powder agglomerates. The metastability of the nanocomposite powders obtained through the (SHS+quench) route was evaluated by annealing. The morphological evolution of the powders after thermal treatment yielded a recrystallisation with limited grain growth of the nanostructured TiC–TiB2 phases and demonstrated the metastability of the products obtained by the (SHS+quench) route.

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Periodical:

Advances in Science and Technology (Volume 45)

Pages:

1005-1010

DOI:

https://doi.org/10.4028/www.scientific.net/AST.45.1005

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Online since:

October 2006

Authors:

Dario Vallauri, Y. López, Bruno DeBenedetti, Ignazio Amato

Keywords:

Metastability, Nanostructured, Quenching, Self-Propagation High-Temperature Synthesis (SHS), TiC-TiB₂ Composites

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