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理學院
物理學系
學位論文
學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73905
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search.filters.author.侯勁龍
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search.filters.subject.皺化
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search.filters.subject.覆鈀
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search.filters.subject.鉭
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2008
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覆鈀鉭針之皺化結構研究
(
2008
)
侯勁龍
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本研究先以多晶鉭線材在真空退火下再次結晶,並以掃描電子顯微鏡(SEM)與聚焦離子束(FIB)系統檢視晶粒擴大現象,其蝕刻成針尖形樣品後,結構較為穩固,提高在場離子顯微鏡(FIM)觀察時的電場耐受度。而鉭線退火於壓力10-6~10-7 Torr下,以SEM觀測表面發現因殘餘氣體誘發的皺化結構,以FIM系統鋪氧測試多組退火參數,尚未發現皺化結構。而覆鈀鉭針以675°C~685°C退火觀察,可發現由3個{110}擴張聚向鉭(111)面的皺化結構。
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