Iron aluminide useful as electrical resistance heating elements

Sikka, Vinod K; Deevi, Seetharama C; Fleischhauer, Grier S; Hajaligol, Mohammad R

Title: 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, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.

Inventors:

Sikka, Vinod K ^[1]; Deevi, Seetharama C ^[1]; Fleischhauer, Grier S ^[2]; Hajaligol, Mohammad R ^[3]; Lilly, Jr., A. Clifton ^[4]

Oak Ridge, TN
Midlothian, VA
Richmond, VA
(Chesterfield, VA)

Issue Date:: 1999-01-01

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 872625

Patent Number(s):: 5976458

Assignee:: Philip Morris Incorporated (New York, NY)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
B22F2201/05 - Water or water vapour
B22F2998/00 - Supplementary information concerning processes or compositions relating to powder metallurgy
B22F2998/10 - Processes characterised by the sequence of their steps
B22F2999/00 - Aspects linked to processes or compositions used in powder metallurgy
B22F3/04 - by applying fluid pressure {, e.g. by cold isostatic pressing [CIP]}
B22F3/10 - Sintering only
B22F3/1208 - {Containers or coating used therefor}
B22F3/15 - Hot isostatic pressing
B22F3/18 - by using pressure rollers
B22F3/20 - by extruding
B22F3/23 - involving a self-propagating high-temperature synthesis or reaction sintering step {
B22F9/082 - {atomising using a fluid

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C33/0278 - {with at least one alloying element having a minimum content above 5%}
C22C38/06 - containing aluminium

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DOE Contract Number:: AC05-84OR21400

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: iron; aluminide; useful; electrical; resistance; heating; elements; relates; aluminum; containing; iron-base; alloys; improved; temperature; ductility; resistivity; cyclic; fatigue; oxidation; strength; sagging; alloy; entirely; ferritic; microstructure; free; austenite; weight; ltoreq; gtoreq; 05; zr; zro; stringers; extending; perpendicular; exposed; surface; element; oxide; dispersoid; particles; contain; 14-32; 30; electrically; insulating; conductive; covalent; ceramic; rare; earth; metal; oxygen; cu; balance; temperature sagging; aluminum containing; oxide dispersoid; base alloy; base alloys; aluminide useful; entirely ferritic; fatigue resistance; ferritic microstructure; containing iron-base; conductive covalent; iron-base alloys; cyclic fatigue; covalent ceramic; temperature strength; heating elements; resistance heating; exposed surface; oxidation resistance; temperature ductility; heating element; ceramic particles; electrically insulating; electrically conductive; rare earth; earth metal; electrical resistance; electrical resistivity; iron aluminide; ceramic particle; temperature oxidation; stringers extending; extending perpendicular; containing iron; alloys useful; dispersoid particles; resistance heat; /419/

Citation Formats


                    Sikka, Vinod K, Deevi, Seetharama C, Fleischhauer, Grier S, Hajaligol, Mohammad R, and Lilly, Jr., A. Clifton. Iron aluminide useful as electrical resistance heating elements.  United States: N. p., 1999. 
        Web.

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                    Sikka, Vinod K, Deevi, Seetharama C, Fleischhauer, Grier S, Hajaligol, Mohammad R, & Lilly, Jr., A. Clifton. Iron aluminide useful as electrical resistance heating elements.  United States.

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                    Sikka, Vinod K, Deevi, Seetharama C, Fleischhauer, Grier S, Hajaligol, Mohammad R, and Lilly, Jr., A. Clifton. Fri .  
        "Iron aluminide useful as electrical resistance heating elements".  United States.  https://www.osti.gov/servlets/purl/872625.

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@article{osti_872625,

  title        = {Iron aluminide useful as electrical resistance heating elements},

  author       = {Sikka, Vinod K and Deevi, Seetharama C and Fleischhauer, Grier S and Hajaligol, Mohammad R and Lilly, Jr., A. Clifton},

  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, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1999},

  month        = {1}

}

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Works referenced in this record:

The effect of ternary additions on the vacancy hardening of FeAl
journal, April 1994

Kong, C. H.; Munroe, P. R.
Scripta Metallurgica et Materialia, Vol. 30, Issue 8
https://doi.org/10.1016/0956-716X(94)90559-2

A review of recent developments in Fe ₃ Al-based alloys
journal, August 1991

McKamey, C. G.; DeVan, J. H.; Tortorelli, P. F.
Journal of Materials Research, Vol. 6, Issue 8
https://doi.org/10.1557/JMR.1991.1779

Powder Processing of Fe ₃ Al-Based Iron-Aluminide Alloys
journal, January 1990

Sikka, V. K.; Baldwin, R. H.; Reinshagen, J. H.
MRS Proceedings, Vol. 213
https://doi.org/10.1557/PROC-213-901

Microstructure and tensile properties of Fe-40 At. pct Al alloys with C, Zr, Hf, and B additions
journal, September 1989

Gaydosh, D. J.; Draper, S. L.; Nathal, M. V.
Metallurgical Transactions A, Vol. 20, Issue 9
https://doi.org/10.1007/BF02663202

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Similar Records

Title: Iron aluminide useful as electrical resistance heating elements

Abstract

Citation Formats

The effect of ternary additions on the vacancy hardening of FeAl journal, April 1994

A review of recent developments in Fe 3 Al-based alloys journal, August 1991

Powder Processing of Fe 3 Al-Based Iron-Aluminide Alloys journal, January 1990

Microstructure and tensile properties of Fe-40 At. pct Al alloys with C, Zr, Hf, and B additions journal, September 1989

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journal, April 1994

A review of recent developments in Fe ₃ Al-based alloys
journal, August 1991

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journal, January 1990

Microstructure and tensile properties of Fe-40 At. pct Al alloys with C, Zr, Hf, and B additions
journal, September 1989