On the Low Temperature Densification of Reactively Hot Pressed Non-Stoichiometric ZrC and (Zr,Ti)C

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• 作者：Tamoghna Chakrabarti^a ; Lingappa Rangaraj^b ; Vikram Jayaram^a ; ^{qjayaram@materials.iisc.ernet.in" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Zirconium Carbide ; UHTC ; Reactive Hot Pressing ; Hot Pressing ; Sintering
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：9
• 页码：3077-3085
• 全文大小：1486 K

文摘

Reactive hot pressing (RHP) as a low temperature processing route is explored in the present work. For this purpose, metal-carbide mixtures, 1:1 molar ratio of zirconium (Zr): zirconium carbide (ZrC) and titanium (Ti): ZrC, are chosen, along with a temperature of 900°C and 50 MPa pressure. Further, pressureless reaction sintering (RS) is done at 1300-1600°C temperature. It has been found that after 1400°C RS, both the compositions reach almost full density. Ti, ZrC composition shows higher hardness (13 vs 11 GPa) than the Zr, ZrC composition. This process would allow dense products to be made by RHP more economically at lower temperature.