放电等离子烧结Ni20Cr-xAl合金的高温氧化行为

刘丞济, 孙文瑶, 陈明辉, 王福会

High-Temperature Oxidation Behavior of Spark Plasma Sintered Ni20Cr-xAl Alloys

LIU Chengji, SUN Wenyao, CHEN Minghui, WANG Fuhui

表1 铸态和SPS制备Ni20Cr-xAl合金在900℃恒温氧化100 h的氧化增重(Δw)和氧化速率常数(kp)

Table 1 Δw and oxidation rate constant (kp) of the as-cast and SPSed alloys after oxidation at 900oC for 100 h

Alloy state x Δw mg·cm-2 kp mg2·cm-4·s-1 As-cast 1.5 0.45 5.53 × 10-7 3.0 0.42 4.95 × 10-7 5.0 0.28 2.22 × 10-7 SPSed 1.5 0.75 1.55 × 10-6 3.0 0.25 1.06 × 10-7 5.0 0.20 4.92 × 10-8