(中國科學院金屬腐蝕與防護研究所金屬腐蝕與防護國家重點實驗室， 沈陽110015)
摘 要: 用聲發(fā)射技術研究了Fe-23Cr-5Al-0.21Ti合金在1100℃空氣中氧化后的氧化膜破裂行為及離子注入1×1017Y+/cm2對氧化膜破裂行為的影響。實驗結果表明：隨著氧化時間的增長， Fe-23Cr-5Al-0.21Ti合金在冷卻過程中氧化膜開始發(fā)生破裂的時間相同，表明氧化膜發(fā)生破裂的臨界應力相同，但聲發(fā)射累積計數增加， 表明膜破裂程度加重。 離子注入Y+后氧化膜發(fā)生破裂的時間延遲，表明膜發(fā)生破裂的臨界應力增大，且聲發(fā)射計數減少，表明膜破裂程度減小，氧化膜粘附性得到顯著提高。
關鍵字: 聲發(fā)射； Fe-Cr-Al合金； 離子注入釔； 氧化
（Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals, The Chinese Academy of Sciences, Shenyang 110015, P.R.China）
Abstract:The cracking and spalling behavior of oxide scale formed on Fe-23Cr-5Al-0.21Ti alloy at 1100℃ in air and the effect of 1×1017Y+/cm2 implantation were studied using acoustic emission technique (AE). The results show that, with increasing oxidation time, the initial time when oxide scale suffered from cracking and spalling is same, indicating that the critical cracking stress of oxide scale on Fe-23Cr-5Al-0.21Ti is not changed, but the cumulative AE events increased, referring that cracking and spalling is more serious. The initial time of oxide scale suffered from cracking and spalling is delayed and the cumulative AE events is decreased by yttrium ion implantation, indicating that the critical cracking stress of oxide scale is increased and scale is more resistant to fracture.
Key words: acoustic emission； Fe-Cr-Al alloy； yttrium implantation； oxidation
