摘要
高推重比航空发动机中的钛火在燃烧过程中燃烧界面对钛合金燃烧行为有重要影响。研究结果表明，钛合金燃烧产物与空气的界面及产物内部因膨胀系数、Ｐ－Ｂ比不同等原因，均严重开裂、多孔，不能阻止燃烧的持续进行。纯钛和ＴＣ４合金燃烧产物与基体的界面也如此，而Ｔｉ４０阻燃钛合金的燃烧产物与基体的界面致密，界面产物是稳定的具有保护作用的Ｃｒ２Ｏ３，可阻止空气中可燃气体氧向基体内扩散，降低合金的燃烧速度。
Titanium fire found in advanced aircraft engines has attracted interesting attentions.Influences of interface on the burning behavior are important.The results reveal that the interface between burning products and air is cracks and porous,which can not retard oxygen diffusion into the matrix and the burn.The interface between burning products and matrix for C.P.Ti and Ti 6 4 is also cracks and porous,however the interface of Ti40 alloy is tenacious,which is in the form of Cr 2O 3,and this product can retard oxygen diffusion into the matrix and reduces the buning velocity.Thereby burn resistant mechanism of suspending oxygen diffusion is put forward.
出处
《航空材料学报》
EI
CAS
CSCD
1999年第1期29-33,共5页
Journal of Aeronautical Materials
基金
国家计委"九五"攻关项目
关键词
界面
阻燃机理
钛合金燃烧
burn resistant titanium alloys
interface
burn resistant mechanism
titanium burn
