EFFECT OF INTERFACIAL MICROSTRUCTURE ON QUALITY OF Al2 O3/Nb SEAL.

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作者
Wen, Lishi [1 ]
Wu, Shengjin [1 ]
Si, Chongyao [1 ]
机构
[1] Acad Sinica, Shenyang, China, Acad Sinica, Shenyang, China
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ALUMINA - Bonding - NIOBIUM AND ALLOYS - Bonding;
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摘要
Through a study of Na corrosion of an Al//2O//3/Nb seal interface, it is shown that the main factor influencing the seal and the lifetime of a high pressure natrium lamp is the interface bonding between the glass seal and Nb. The microstructure of the interface has been studied by means of TEM. Based on a thermodynamic analysis and the J. A. Pask theory of metal/ceramic interface bonding, the physicochemical process of glass seal/Nb interfaces and the bonding mechanism during sealing is discussed.
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