Atom probe tomography analysis of WC powder
Artikel i vetenskaplig tidskrift, 2013

A tantalum doped tungsten carbide powder, (W,Ta)C, was prepared with the purpose to maximise the amount of Ta in the hexagonal mixed crystal carbide. Atom probe tomography (APT) was considered to be the best technique to quantitatively measure the amount of Ta within this carbide. As the carbide powder consisted in the form of very small particles (< 1 mu m), a method to produce APT specimens of such a powder was developed. The powder was at first embedded in copper and a FIB-SEM workstation was used to make an in-situ lift-out from a selected powder particle. The powder particle was then deposited on a post made from a WC-Co based cemented carbide specimen. With the use of a laser assisted atom probe, it was shown that the method is working and the Ta content of the (W,Ta)C could be measured quantitatively. (C) 2013 Elsevier B.V. All rights reserved.

apt analysis

carbides

Analysis of submicron particles

APT

co

focused ion-beam

Specimen preparation

Författare

Jonathan Weidow

Chalmers, Teknisk fysik, Materialens mikrostruktur

Ultramicroscopy

0304-3991 (ISSN)

Vol. 132 295-299

Ämneskategorier

Kemi

DOI

10.1016/j.ultramic.2013.01.008

Mer information

Skapat

2017-10-07