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- W3036682692 abstract "Introduction In recent papers (Fraser and Jones 1975, Fraser, Jones and Loretto 1977) it has been shown that STEM does not offer an increase in penetration of metallurgical specimens over that available in CTEM. It was argued that two factors, lack of intensity and a top/bottom effect, limit penetration in both CTEM and STEM and the relative importance of these factors is expected to differ for different experimental requirements. The present paper examines an experiment with requirements such that the intensity limit in STEM may be overcome by using a large probe of about 40nm diameter. Experimental Specimens of a complex copper alloy (Long 1977) containing particles of Cr (∼10nm in diameter) and particles of SiO 2 (∼0.5 μm in diameter) have been examined at 100kV in STEM and CTEM using a Philips EM40O fitted with a conventional tungsten hairpin filament. In addition micrographs have also been obtained at 1MV in an AEI EM7. The contrast mechanism was of structure factor type." @default.
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- W3036682692 date "1978-01-01" @default.
- W3036682692 modified "2023-09-27" @default.
- W3036682692 title "Low resolution STEM imaging" @default.
- W3036682692 cites W2032570366 @default.
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- W3036682692 doi "https://doi.org/10.1017/s0424820100108891" @default.
- W3036682692 hasPublicationYear "1978" @default.
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