HEDP表面处理对Ni<sub>3</sub>Al氧化行为的影响

HEDP表面处理对Ni₃Al氧化行为的影响

摘要: 利用高能量密度等离子体(HEDP)对金属间化合物Ni₃Al进行了表面处理,在合金表面获得了纳米级微晶层.该微晶层可以通过增加Al₂O₃优先形核位置和提高Al的向外扩散促进Ni₃Al氧化时形成表面Al₂O₃,消除了生长速度较快的NiO相.

Abstract: Surface treatment to the Ni₃Al intermetallic compound was conducted by high energy density plasma and nanometer micro-crystalline layers were developed on the alloy surface.Formation of protective Al₂O₃, scales on the alloy surface was promoted by increasing the nucleaton sites and enhancing the outward ditheion of Al in the micro-crystalline structure. The fast growing phase NiO was eliminated in the oxide scales.