Chemical extraction of refractory inclusions from iron- and nickel-base alloys

Journal Article · Mon Dec 01 04:00:00 EST 1975 · Metallography

DOI:https://doi.org/10.1016/0026-0800(75)90023-3· OSTI ID:4012258

Burke, Keith E.

Most iron- and nickel-base alloys contain certain refractory inclusions, which affect the physical properties of the alloy. Carbides are the predominant inclusion, but oxides, nitrides, sulfides, borides, and phosphides may also be present. A chemical extraction has been developed which effectively separates these inclusions from the matrix without the application of an external potential. The refractory inclusions are quantitatively extracted by chemical dissolution of the matrix at 25$sup 0$C with a solution 0.9 M in copper(II) potassium chloride and hydrochloric acid. The reagent also contains 0.1 M tartaric acid to avoid contamination of the insoluble inclusion with matrix hydrolysis products. The chemical extractant is identified as the Berzelius reagent. The solvent is a general reagent for the isolation of most refractory phases: carbides, nitrides, phosphides, sulfides, oxides, and certain intermetallic compounds. The reagent dissolves alloys which are predominantly aluminum, cobalt, copper, iron, nickel, or zinc. The separation requires up to 24 hours to dissolve the alloys' matrix.

• Research Organization: International Nickel Co., Inc., Suffern, NY
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-026788
• OSTI ID: 4012258
• Journal Information: Metallography, Journal Name: Metallography Journal Issue: 6 Vol. 8; ISSN 0026-0800
• Country of Publication: United States
• Language: English

Related Subjects

*INCOLOY ALLOYS-- CHEMICAL COMPOSITION
*INCONEL ALLOYS-- CHEMICAL COMPOSITION
*MONEL-- CHEMICAL COMPOSITION
*RENE 41-- CHEMICAL COMPOSITION
*UDIMET ALLOYS-- CHEMICAL COMPOSITION
*WASPALOY-- CHEMICAL COMPOSITION
360103* --Materials--Metals & Alloys--Mechanical Properties
CARBIDES
CHEMICAL ANALYSIS
INTERSTITIALS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
NITRIDES
OXIDES
PHOSPHIDES
REAGENTS
SULFIDES
X-RAY DIFFRACTION