W-5%Re/W-26%Re钨铼偶丝氧化行为  

Oxidation behaviors of W-5%Re and W-26%Re tungsten-rhenium thermocouple wires

作　　者：戴民[1,2] 何占伟[2] 王魁汉[3] 樊占国[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]沈阳建筑大学材料科学与工程学院,沈阳110168 [3]沈阳东大传感技术有限公司,沈阳110001

出　　处：《材料与冶金学报》2014年第1期55-59,共5页Journal of Materials and Metallurgy

基　　金：辽宁省科技型中小企业创新基金(10C26222110454)

摘　　要：为了解钨铼热电偶丝在空气中的氧化过程、氧化产物成分、氧化膜生长情况,进行了DSC/TG、XRD、SEM等实验.通过填充惰性物质、脱氧、造氢、密封等实体化技术对钨铼热电偶进行了防氧化保护,利用SEM观察了保护后的钨铼偶丝的形貌.结果表明:在空气中,钨铼偶丝高温氧化产物主要为WO3;W-5%Re偶丝873℃时已经可以观察到氧化,W-26%Re的氧化温度可低至681℃;钨铼偶丝氧化层开裂并呈放射状生长,不能形成保护性氧化膜;经防护后的钨铼偶丝断面保持完整,未出现明显氧化膜.DSC/TG, XRD and SEM tests were employed to study the oxidation behavior of tungsten - rhenium thermocouple wires： oxidation process in the air, composition of the oxidation products and growth of the oxide film. The tungsten - rhenium thermocouple wires were protected with the solidified technology and then were observed by SEM. The results showed that, in the air, the oxidation of W -26% Re thermocouple wires could be found at 681℃ while W - 5% Re at 873℃. The major oxidization products were WO3 at high temperature. The oxide layers could not form a protective film because they cracked and grew in a form of radiation. For the protected tungsten - rhenium thermocouple wires, the section was intact, and no oxide was found.

关 键 词：钨铼热电偶 氧化 铼效应 实体化 

分 类 号：TG132.241[一般工业技术—材料科学与工程]