【作者】 王芳； 吕猛；

【Author】 Wang Fang~(1,2) Lv Meng~2 1)North University of China,Taiyuan Shanxi 030051 2)Taiyuan University of Science and Technology,Taiyuan Shanxi 030024

【机构】 中北大学； 太原科技大学；

【摘要】 燃烧合成技术在制备多孔材料方面有其独特的优势。论文基于Al-Ti-B₄C-TiH₂系燃烧合成反应制备泡沫铝。通过燃烧过程中的反应放热量、燃烧温度、原料配比临界条件的理论计算及DSC曲线分析对Al-Ti-B₄C-TiH₂系燃烧合成反应进行热力学研究。实验结果表明:Al-Ti间、Ti-B₄C间反应分别在800℃及1300℃左右发生,首先Al-Ti间反应,随着反应放热量的增加Ti-B₄C间反应被激活,大量剩余的Ti优先与B₄C反应直至无B₄C存在,剩余的Ti再与Al反应,Al-Ti间反应的最终产物应为TiAl₃。原料中的TiH₂受热分解释放出气体迫使预制体膨胀得到泡沫铝。原料配比的临界条件中铝的质量分数为76%,且生成物中铝相质量分数为68.8%。。更多还原

【Abstract】 Combustion Synthesis（CS） has its unique advantages in the preparation of porous materials.In this paper,the aluminum foam is produced based on Al-Ti-B4C-TiH2 reaction.The thermodynamics of Al-Ti-B₄C-TiH₂ reaction has been researched by the theoretical calculations of combustion temperature,the critical condition and the released heat.DSC curve analysis results showed that the reaction temperature between Al-Ti and Ti-B₄C was 800℃and 1300℃respectively.Al and Ti reacted firstly, then the reaction heat caused the reaction of Ti and B₄C.The remain of Ti reacted with Al to form TiAl₃.The power of TiH₂ was heated to release gas to make the precursor expansion.T the mass fraction of aluminum in the raw material ratio and combustion products can reach to 76%and 68.8%respectively.更多还原