Iron aluminide useful as electrical resistance heating elements
Abstract
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:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 462858
- Patent Number(s):
- 5620651
- Application Number:
- PAN: 8-426,006
- Assignee:
- Philip Morris Inc., New York, NY (United States)
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 15 Apr 1997
- 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
Citation Formats
Sikka, V K, Deevi, S C, Fleischhauer, G S, Hajaligol, M R, and Lilly, Jr, A C. Iron aluminide useful as electrical resistance heating elements. United States: N. p., 1997.
Web.
Sikka, V K, Deevi, S C, Fleischhauer, G S, Hajaligol, M R, & Lilly, Jr, A C. Iron aluminide useful as electrical resistance heating elements. United States.
Sikka, V K, Deevi, S C, Fleischhauer, G S, Hajaligol, M R, and Lilly, Jr, A C. Tue .
"Iron aluminide useful as electrical resistance heating elements". United States.
@article{osti_462858,
title = {Iron aluminide useful as electrical resistance heating elements},
author = {Sikka, V K and Deevi, S C and Fleischhauer, G S and Hajaligol, M R and Lilly, Jr, A C},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {4}
}