Effects of Raw Material Content on Efficiency of TiN Synthesized by Reactive Ball Milling Ti and Urea
Autor: | LI Xiao-Pu, Zhao Yu-Cheng, Liang Bao-Yan, Wang Ming-zhi, Sun Jin-Feng |
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Rok vydání: | 2009 |
Předmět: | |
Zdroj: | Chinese Physics Letters. 26:078102 |
ISSN: | 1741-3540 0256-307X |
Popis: | Ti and urea mixed according to the molar ratios of 2:1, 3:1 and 4:1 are milled under the same condition. The structures of the as-synthesized powders are analyzed by an x-ray diffractometer (XRD). The decomposed temperature of the urea and the products decomposed are characterized by differential scanning calorimetry (DSC) and thermogravimetry analysis-Fourier transform infrared (TG-FTIR) spectrometry. The results show that the reaction progress is a diffusion reaction. The efficiency of TiN synthesized by reactive ball milling can be increased by increasing the content of Ti. The reactive ball milling time decreases from more than 90 h to 40 h corresponding to the content ratio between Ti and urea increasing from 2:1 to 4:1. Ammonia gas (NH3) and cyanic acid (HNCO), the decomposed products of urea, react with the refined Ti to form TiN. The grain refinement of Ti has a significant effect on the efficiency of reactive ball milling. |
Databáze: | OpenAIRE |
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