THE STRUCTURAL CHANGES OF Ag-Sn BIMETALLIC FILMS DURING HEATING | Zendy

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THE STRUCTURAL CHANGES OF Ag-Sn BIMETALLIC FILMS DURING HEATING

Author(s) -

Wei Cai,

WU ZI-QIN

Publication year - 1982

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.31.1380

Subject(s) - materials science , tin , agglomerate , phase (matter) , bimetallic strip , economies of agglomeration , substrate (aquarium) , raising (metalworking) , chemical engineering , morphology (biology) , carbon fibers , composite material , metallurgy , metal , chemistry , oceanography , organic chemistry , geology , biology , genetics , engineering , composite number

The structural changes of Ag-Sn films on carbon film have been observed during heating to about 640℃ by using TEM and HVEM. Raising the temperature to 200-250℃, silver and tin react rapidly to form γ phase Ag3Sn. Raising the temperature above 480℃, the γ phase transforms suddenly into laminar β phase. At about 510℃, the β phase film begins to agglomerate. The morphology of the Ag-Sn films on GaAs substrate after heating has been observed by using SEM. It is shown that when the tin content of Ag-Sn films (20-65wt%Sn) is greater and the alloying temperature is higher, the agglomeration of the film is more severe.

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