Global to push GA events into
skip to main content

Title: Iron aluminide useful as electrical resistance heating elements

The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, {<=}1% Cr and either {>=}0.05% Zr or ZrO{sub 2} stringers extending perpendicular to an exposed surface of the heating element or {>=}0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, {<=}2% Ti, {<=}2% Mo, {<=}1% Zr, {<=}1% C, {<=}0.1% B, {<=}30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, {<=}1% rare earth metal, {<=}1% oxygen, {<=}3% Cu, balance Fe. 64 figs.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
462858
Assignee:
Philip Morris Inc., New York, NY (United States) PTO; SCA: 360100; 320106; PA: EDB-97:061696; SN: 97001767250
Patent Number(s):
US 5,620,651/A/
Application Number:
PAN: 8-426,006
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 15 Apr 1997
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; IRON BASE ALLOYS; ALUMINIUM ALLOYS; ELECTRIC APPLIANCES; ELECTRIC CONDUCTIVITY; MICROSTRUCTURE; CHEMICAL COMPOSITION; CORROSION RESISTANCE; MECHANICAL PROPERTIES