EFFECT OF INTERFACIAL MICROSTRUCTURE ON QUALITY OF Al_2O_3/Nb SEAL

Acta Metall Sin

1988, Vol. 24

Issue (1): 97-103 DOI:

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EFFECT OF INTERFACIAL MICROSTRUCTURE ON QUALITY OF Al_2O_3/Nb SEAL

WEN Lishi;WU Shengjin;SI Chongyao Institute of Metal Research; Academia Sinica; ShenyangWEN Lishi Associate professor;Institute of Metat Research;Acudemia Sinica;shenyang

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WEN Lishi;WU Shengjin;SI Chongyao Institute of Metal Research; Academia Sinica; ShenyangWEN Lishi Associate professor;Institute of Metat Research;Acudemia Sinica;shenyang. EFFECT OF INTERFACIAL MICROSTRUCTURE ON QUALITY OF Al_2O_3/Nb SEAL. Acta Metall Sin, 1988, 24(1): 97-103.

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Abstract Through a study on Na corrosion of Al_2O_3/Nb seal interface, itis shown that the main factor influencing the Al_2O_3/Nb seal and the lifetime ofhigh pressure natrium lamp is the interface bonding between glass seal and Nb. The microstructure of interface of high pressure natrium lamp with differentlifetime has been studied by means of TEM, and the influence of interface struc-ture on the quality of Al_2O_3/Nb seal has been revealed. Based on the thermodyna-mic analysis and Pask theory of metal/ceramic interface bonding, the physicoche-mical process of glass seal/Nb interfaces and bonding mechanism during sealing hasalso been discussed.

Key words: microstructure Al_2O_3/Nb seal interface

Received: 18 January 1988

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