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dc.contributor.author譚澤安en_US
dc.contributor.authorJohn Tanen_US
dc.contributor.author劉增豐en_US
dc.contributor.authorTzeng-Feng Liuen_US
dc.date.accessioned2014-12-12T02:10:21Z-
dc.date.available2014-12-12T02:10:21Z-
dc.date.issued1992en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#NT810159016en_US
dc.identifier.urihttp://hdl.handle.net/11536/56686-
dc.description.abstract我們利用穿透式電子顯微鏡(TEM)以及X光能量分佈儀(EDS)來觀察銅-25 錳 -25鋁(合金 A)和銅-25錳-35鋁(合金 B)的淬火顯微結構結果發現如下 :當合金 A 經850℃作固溶處理1小時後,淬火於冰食鹽水中,發現有細 小的析出物在基地內形成,分析包含析出物及其周圍基地的選擇區域繞射 圖形。結果發現Cu-25Mn-25Al(Cu2MnAl,合金 A)的淬火顯微結構為(L21 +ω)相的混合,此結果與其它學者所觀察到的單一L21相不同。當合金 B 經850℃作固溶處理1小時後,淬火於冰食鹽水中,Cu-25Mn- 35Al(合 金 B)的淬火顯微結構為(L21+B2+ω)相的混合,此結果與其它研究學者 在Cu3-xMnxAl合金系統中所觀察到的顯微結果截然不同。 The as-quenched microstructures of Cu-25Mn-25Al ( Alloy A ) and Cu-25Mn-35Al ( Alloy B ) alloys have been investigated by using transmission electron microscopy ( TEM ) and energy-dispersive X-ray spectrometer. ( EDS) The experimental results are summarized as follow: When the alloy A was solution heat- treated at 850℃ for 1 hour and then quenched into iced brine rapidly. There are some fine precipitates presented within the matrix in the as-quenched specimen. From the analyses of the selected-area diffraction patterns ( SADPs ) taken from an area which covers fine precipitates and their surrounding matrix, it is concluded that the as-quenched microstructure of the Cu-25 Mn-25Al ( Cu2MnAl, Alloy A ) alloy is a mixture of ( L21 + w ) phases, rather than a single L21 phase reported by other workers in the as-quenched Cu2MnAl alloy. When the alloy B was solution heat-treated at 850℃ for 1 hour and then rapidly quenched into iced brine. The microstructure of the Cu-25Mn-35 Al (Alloy B ) alloy is a mixture of ( L21 + B2 + w ) phases, which is quite different from that reported by other workers in the Cu3-xMnxAl alloy system.zh_TW
dc.language.isoen_USen_US
dc.subjectzh_TW
dc.title銅-25錳-25鋁和銅-25錳-35鋁合金淬火顯微結構zh_TW
dc.titleThe As-quenched Microstructures of Cu-25Mn-25Al and Cu-25Mn-35Al Alloysen_US
dc.typeThesisen_US
dc.contributor.department材料科學與工程學系zh_TW
Appears in Collections:Thesis