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題名 | Processing Fine Ceramic Powders by a Combination of Self-Propagating High-Temperature Synthesis and High Energy Milling=利用傳播燃燒合成及高能量碰撞合成微小粉末之製程法 |
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作者 | 李弘斌; 劉正; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 27:1 1996.01[民85.01] |
頁次 | 頁1-8 |
分類號 | 446.47 |
關鍵詞 | 傳播燃燒合成; 高能量碰撞合成; 微小粉末; 製程; High energy milling; Mechanical alloying; Self-propagating high-temperature synthesis; SHS; Combustion synthesis; |
語文 | 英文(English) |
中文摘要 | 本文以二硼化鈦(TiB₂)反應為例子,探討傳播燃燒合成(self-propagating high-temperature synthesis)和高能量碰撞(high energy milling)/機械合金化(mechanical alloying)之製成。在本文中,利用機械合金化之震動性,將用來反應的反應物震碎,使其粉末之顆粒變小,再將這些經過不同震動時間的粉末(不同顆粒大小),以傳播燃燒合成的方式合成材料,使其反應成為產物。本文主要討論不同震動時間對傳播燃燒合成的影響:我們發現震動時間的增加會減少反應物顆粒的大小,進而增加反應的溫度及速度。而我們也發現微小的二硼化鈦粉末也可直接由高能量碰撞合成。在本文中,我們也由放熱反應及熱力學的觀點,對傳播燃燒合成和高能量碰撞之關聯性作一探討。 |
英文摘要 | Processing TiB₂ ceramic powders by a combination of self-propagating high-temperature synthesis(SHS) and high energy milling/mechanical alloying (MA) has been studied in this work. The milling time of the unreacted powders was noted to influence the reaction parameters of the self-propagating high-temperature synthesis. As the milling time was increased, the reactant size was decreased due to the collision between the powders and the balls. A decrease in the reactant size increased the reactivity and the combustion temperature/propagation velocity, further influencing the microstructure /properties of the synthesized products. Fine TiB/sub 2/ ceramic powders were spontaneously formed when the high energy milling time was further increased to a critical time. In addition to self- propagating high-temperature synthesis and high energy milling, other techniques using the exothermic reaction to process materials are also discussed in this article. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。