螺旋燃烧的实验研究与观察  

Experimental study and observation on spin combustion

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作  者:李军[1] 苏娟[2] 程金华[2] 张树格[2] 

机构地区:[1]南京工业大学材料科学与工程学院,南京210009 [2]南京工业大学电光源材料研究所,南京210015

出  处:《中国有色金属学报》2004年第7期1246-1253,共8页The Chinese Journal of Nonferrous Metals

摘  要:对在Ni Si、Ti Ni和铝热反应体系中的螺旋燃烧进行了实验研究与观察。主要研究了Ni Si系统中原始化学配比、坯体的原始密度、硅颗粒尺寸及起始温度对螺旋燃烧工艺的影响以及Ti Ni系统中预热温度及原始化学配比对燃烧工艺及模式的影响。结果表明:螺旋燃烧是一种非稳态燃烧,弱的放热反应或反应中的热量损失可能导致燃烧源的不稳定,强化反应过程(如预热)能够改变燃烧模式,使非稳态螺旋燃烧向稳态燃烧转变。The experimental investigation and observation on the spin combustion in Ni-Si, Ti-Ni and thermite systems were presented. The effects of the initial stoichiometry, initial density, particle size of silicon, and initial temperature on the spin combustion process were studied mainly in Ni-Si system. In Ti-Ni system, the effects of preheating temperature and initial stoichiometry of compact on combustion process and mode were studied. The results show that the spin combustion is one of the non-steady state combustion. Weak exothermic reaction or heat loss in the reaction can result in the non-stability of combustion wave. Strengthening the reaction process such as preheating can change combustion mode from unstable spin combustion to stable one.

关 键 词:螺旋燃烧 燃烧模式 燃烧合成 

分 类 号:TF12[冶金工程—粉末冶金]

 

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