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INTERACTION BETWEEN Cu AND LIQUID Sn(II)——SEM OBSERVATION OF INTERMETALLIC GROWTH

ZHANG Qiyun , LIU Shuqi , XU Yaping Peking University , Beijing , China professor , Department of Chemistry , Peking University , Beijing , 100871 , China

金属学报(英文版)

The features of Cu_6Sn_5 growing slowly at lower temperature and growing rapidly up over 350℃,and or Cu_3Sn growing at higher temperatures,bave been detailedly observed under SEM.The increase of Pb content seems to inhibit sequentially the growth of Cu_6Sn_5 in Pb-Sn alloy....

关键词: Cu , null , null , null , null

INTERACTION OF OXIDE FILM WITH MOLTEN FLUX DURING ALUMINUM BRAZING

ZHANG Qiyun , LIU Shuqi , ZHANG Yuhua , Peking University , Beijing , China

金属学报(英文版)

The interaction of oxide film with molten flux during aluminum brazing has been studied by means of X-ray powder diffraction. The following conclusions have been deduced: The swell- ing of aluminum oxide film is caused by Li~+ inserting into the vacancies of octahedral or tetrahedral structure of 0 ...

关键词: molten salt flux , null , null

LIQUIDUS OF SYSTEM Ag-Cu-Ge

LIU Shuqi , YI Tao , Peking University , Beijing , China

金属学报(英文版)

The diagram of Ag-Cu-Ge system was constructed from the investigation of 13 internal sec- tions by DTA heating as well as cooling curves in an atomsphere of dry N_2 . The phase dia- gram is subdivided into two pseudo-ternary systems shown as Ag-Cu-Cu_3Ge and Ag-Cu_3Ge-Ge. Both systems belong to simp...

关键词: phase diagram , null , null

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