【摘要】 用电沉积方法制备了NiCoCr-Al₂O₃泡沫合金,研究了镀液组分对泡沫合金组分的影响。结果表明,随着镀液中CrCl₃·6H₂O和Al₂O₃的增加,合金中Cr和Al₂O₃含量增加,Cr质量分数高于6．8％,镀层变黑, Al₂O₃质量分数高于8．1％时,合金变脆。合金只有在≥852．37℃热处理后形成了有利于高温抗氧化性的相态,在1 200℃热处理后,合金的高温氧化增重率最低。随着合金中Cr和Al₂O₃含量的增加,合金的高温抗氧化性提高,且Al₂O₃含量对高温抗氧化性影响更显著。更多还原

【Abstract】 NiCoCr-Al₂O₃ foam alloy was electrodeposited,the effects of the composition of solution on the properties of foam alloy were studied.The contents of Cr and Al₂O₃ in the alloy increase with the increases of concentrations of CrCl₃·6H₂O and Al₂O₃ in bath,the alloy surface changes to black when Cr in the alloy is over 6.8%;the alloy becomes fragile when Al₂O₃ in the alloy is over 8.1%.It is foudn that only when the temperature was higher than 852.37℃did the phase which is propitious to antioxidation at high temperatures appear.The effects of treatment temperature on the antioxidation of the alloy at high temperatures were investi- gated,the mass gain was the lowest after the alloy was treated at 1200℃.The effects of chromium and aluminium contents on the antioxidation of the alloy at high temperatures were also studied,the antioxidation of the alloy was improved with increasing the amount of Cr and Al₂O₃ in the alloy.It is found that Al₂O₃ promo- ted the antioxidation of the alloy.更多还原