The analysis of carbide and intermetallic phase γ′ isolates in nickel alloys by means of injection method of flame atomic absorption spectrometry

Abstract

The determination of the chemical composition of intermetallicγ′ phase and carbide isolates is of a great importance for estimating the properties of the high-temperature nickel-base alloys. This paper presents the examination of the application of these isolates for the chemical analysis; a modernized variant of the injection technique of flame atomic absorption is described. It is based on constructing the teflon crater manifold together with a portable capillary bearing. The precision of the determination of the given elements inγ′ phase isolates was as follows: Al 3.5–4.2%, Ti 4.1–4.6%, Mo 3.8–4.2%, Co 2.5–2.8%, W 8.6–8.8%, Nb 11.2–11.6%, Cr 3.1–3.4%, Ta 10.2–10.6%.