Fe_3Al金属间化合物的高温抗氧化性能  

OXIDATION RESISTANCE OF Fe_3Al INTERMETALLICS AT HIGH TEMPERATURES

作　　者：孙杨善[1] 余新泉[1] 黄海波[1] 孙国雄[1] 

机构地区：[1]东南大学材料科学与工程系,南京210096

出　　处：《金属学报》1998年第11期1131-1136,共6页Acta Metallurgica Sinica

基　　金：国家863计划资助!715-005-0122

摘　　要：当温度超过1000℃时、二元Fe3Al的抗氧化性能随温度上升而急剧下降对1200℃氧化试样的SEM分析发现试样表面存在晶须状氧化物，氧化层与基体的界面上有大量的孔洞微量的Ce加入Fe3Al可显著地改善合金的抗氧化性能.在1200℃长时间氧化后，含C3的Fe3Al试样表面平整致密，且无氧化物剥落，其抗氧化性能比不含Ce的合金提高了一个数量级关键词##4Fe_3Al;;金属间化合物;;氧化;;The oxidation resistance of the binary Fe3Al decreases rapidly with the increase of temperature when the temperature is above 1000℃. SEM observations have revealed wisker-shaped oxides on specimen surface oxidized at 1200℃. Cavities and internal oxidation have been observed between the oxidation layer and the matrix of oxidized specimen. Microalloying of Ce increases the oxidation resistance of Fe3Al based alloys significantly. After oxidizing at 1200℃ for a long time (120 h), the specimen surface of the Fe3Al alloy containing cerium is still smooth without spalling and its oxidation resistance is one order of magnitude higher than that of the alloy without cerium addition.

关 键 词：FE3AL 金属间化合物 氧化 耐热合金 

分 类 号：TG132.3[一般工业技术—材料科学与工程]