Browse Prior Art Database

HASTALLOY C COATING CRUCIBLES

IP.com Disclosure Number: IPCOM000026667D
Original Publication Date: 1993-Feb-28
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

Vacuum coating crucibles constructed of Hastalloy C for use in the preparation of alloy based photoreceptors is disclosed. Hastalloy C is available from Haynes-Stellite Corporation, a division of Union Carbide Corporation, and contains about 57 to about 59% by weight of nickel, about 16% molybdenum, about 16% chromium, about 5% iron, about 4% tungsten, and trace amounts of manganese and silicon. Vacuum coating crucibles for evaporation "boats" constructed from Hastalloy C are less likely to warp under thermal stress and also provide more uniform heating of the crucible contents and thereby reduces alloy fractionation. Hastalloy C boats avoid the problem of surface cracking and corrosion which leads to subsequent contamination of the selenium alloy being processed.