NUCAPT Literature Database

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	Record
	Type	Zhou, Yang; Booth-Morrison, Christopher; Seidman, David N.
	Publication	On the field-evaporation behavior of a model Ni-Al-Cr superalloy studied by picosecond pulsed-laser atom probe tomography	Volume	Journal Article
Pages	2008
	Abstract	Microscopy and Microanalysis
	Corporate Author
Publisher	14
Editor	06
	Summary Language	571-580	Series Editor
Abbreviated Series Title	The effects of varying the laser pulse-energy of a picosecond laser used in pulsed-laser atom- probe (PLAP) tomography of an as-quenched Ni-6.24 Al- 9.64 Cr at.% are assessed based on the quality of the mass spectra and the compositional accuracy of the technique. PLAP tomography improves mass resolution, increases the signal-to-noise (S/N) ratio, and improves compositional accuracy, compared to pulsed-voltage atom-probe tomography (APT). Experimental evidence suggests that Ni2+, Al2+ and Cr2+ ions are formed by post-ionization of singly charged ions, as well as by a thermally-activated evaporation process. An analysis of the detected noise levels reveals that there is no significant steady-state heating of the Ni-6.24 Al- 9.64 Cr at.% tips during PLAP tomography for properly chosen instrument parameters.
	Series Issue		ISSN
Medium
	Expedition		Notes
Call Number
Contribution Id
Serial		URL		ISBN
					no	NU @ m-krug @	10216
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