(1. 中國科學院金屬研究所 金屬腐蝕與防護國家重點實驗室， 沈陽 110015；
2. 遼寧大學 化學科學與工程學院， 沈陽 110036；
3. 金屬腐蝕與防護國家重點實驗室客座教授,
Universita di Genova, Fiera del Mare, Pad.D, 16129 Genova,Italy)
摘 要: 研究了兩種單/雙相Cu-Cr-Ni合金的高溫氧化行為。結(jié)果表明，合金氧化動力學偏離拋物線規(guī)律， 其瞬時拋物線速率常數(shù)隨時間延長而降低。兩種合金表面氧化膜的結(jié)構(gòu)差別較大，單相合金表面形成一連續(xù)的Cr2O3層，雙相合金表面氧化膜外層是一連續(xù)的CuO層，Ni和Cr的氧化發(fā)生在合金內(nèi)部。這種合金與氧化物共存的混合內(nèi)氧化與經(jīng)典的內(nèi)氧化明顯不同，氧化層最里面形成了一連續(xù)的Cr2O3膜，抑制了合金的進一步氧化。
關(guān)鍵字: Cu-Ni-Cr合金; 單/雙相組織; 高溫氧化
oxidation of Cu-Cr-Ni alloys
（1. State Key Laboratory for Corrosion and Protection,
Institute of Metal Research， The Chinese Academy of Sciences,
Shenyang 110015, P.R.China;
2. Institute of Chemical Science and Engineering,
Liaoning University， Shenyang 110036, P.R.China;
3. Istituto di Chimica, Facolt di Ingegneria,
Universita di Genova, Fiera del Mare, Pad.D,16129 Genova, Italy）
Abstract:The hightemperature oxidation behavior of both single/double-phase Cu-Cr-Ni alloys was studied . The kinetics for oxidation of both alloys are particularly irregular and deviate from the parabolic rate law and their instantaneous rates decrease with time in creasing. Oxide scale structures for both alloys are completely different, single-phase alloy forms a continuous Cr2O3 outer layer, while double-phase alloy produces a CuO outer layer, nickel and chromium are mainly oxidized inside the alloy, the microstructure of the internal oxidation region containing a mixture of alloy and oxide phases does not correspond to a classical internal oxidation. The further oxidation is restrained because there is a nearly continuous Cr2O3 layer inside the alloy.
Key words: Cu-Cr-Ni alloy; single/double phase morphology; high temperature oxidation
