摘要
对纳米陶瓷颗粒在爆炸冲击波作用下的受力特点进行了分析,利用准静态弹性力学方法研究了颗粒间的冲击摩擦力大小,并利用热传导的尺寸效应和冲击摩擦的强瞬态性(忽略传热的边界散射影响),研究了摩擦引起的颗粒内部温度变化和温度场分布.ITO纳米陶瓷粉末参数的计算分析表明,冷爆炸压实中纳米陶瓷粉末颗粒间很难形成摩擦焊接.要提高纳米陶瓷粉末爆炸压实后的结合强度,必须加强陶瓷颗粒在压实过程中的烧结行为,建议在纳米陶瓷粉末的爆炸压实中采取预热爆炸压实的工艺路线.
Based on the analysis of force action character of nanometer ceramic particles in explosive consolidation, the quasi -static elastic method is proposed to research the impact friction among particles. Using the effect of small dimension of heat conduction and the transient of impact friction, the temperature change and temperature distribution in nano -particle is investigated with omitting the heat scattering at boundary. The heat conduction caused by friction was calculated with parameters of ITO ceramic nanometer particles. It is concluded that it is difficult to form friction welding between ceramic nanometer particles. To intensity the bonding strength between particles after explosive consolidation, the sintering behavior should be reinforced during the consolidation process.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2009年第4期561-565,共5页
Materials Science and Technology
基金
国家自然科学基金(10572034)资助项目
辽宁省自然科学基金(20042161)资助项目
关键词
爆炸压实
传热
纳米陶瓷
摩擦焊接
ITO
explosive consolidation
heat conduction
nanometer ceramic
friction welding
ITO
