Influence of processing parameters on the formation of WC-Co nanocomposite powder using a polymer as carbon source

✍ Scribed by Y.T. Zhu; A. Manthiram

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 640 KB
• Volume: 27
• Category: Article
• ISSN: 1359-8368
• DOI: 10.1016/1359-8368(96)00004-2

✦ Synopsis

Influences of processing parameters on the formation of WC-Co nanocomposite powder employing polyacrylonitrile as a carbon source have been investigated systematically. The processing parameters investigated include firing time and temperature, addition of a small quantity of cobalt acetate initially as a catalyst, and the sample quantity for a given firing scheme. The investigation provides basic information for optimizing processing parameters to obtain finer WC-Co nanocomposite powders with less unwanted phases. Based on the information obtained from systematic investigation, an improved processing procedure is developed, which can avoid some shortcomings of our previously reported procedure. However, the final product still has some undecomposed polymer or uncombined carbon, which needs to be eliminated before the present synthesis route becomes commercially feasible.