Effect of laser power and specimen temperature on atom probe analyses of magnesium alloys

K Oh-ishi; C L Mendis; T Ohkubo; K Hono

doi:10.1016/j.ultramic.2011.01.002

Effect of laser power and specimen temperature on atom probe analyses of magnesium alloys

Ultramicroscopy. 2011 May;111(6):715-8. doi: 10.1016/j.ultramic.2011.01.002. Epub 2011 Jan 8.

Authors

K Oh-ishi¹, C L Mendis, T Ohkubo, K Hono

Affiliation

¹ National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan.

PMID: 21269771
DOI: 10.1016/j.ultramic.2011.01.002

Abstract

The influence of laser power, wave length, and specimen temperature on laser assisted atom probe analyses for Mg alloys was investigated. Higher laser power and lower specimen temperature led to improved mass and spatial resolutions. Background noise and mass resolutions were degraded with lower laser power and higher specimen temperature. By adjusting the conditions for laser assisted atom probe analyses, atom probe results with atomic layer resolutions were obtained from all the Mg alloys so far investigated. Laser assisted atom probe investigations revealed detailed chemical information on Guinier-Preston zones in Mg alloys.