The effects of processing variables on reaction synthesis of Fe-Al alloys

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The effects of alloy composition and reaction atmosphere on reaction synthesis of binary FeAl alloys were studied. Reactions were observed in an open (air) furnace, under static vacuum (in an evacuated quartz tube) and in a dynamic vacuum furnace. High-speed videotapes of reaction syntheses of compacts formed from 45-{mu}m Fe and 10-{mu}m Al powders reacted in air and under static vacuum revealed that an unusual ``two-stage`` reaction exists in this system under these conditions. The first stage of the two-stage reaction lasts several seconds and starts at around 650 C. The second stage begins at about 900 C, reaching temperatures ... continued below

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7 p.

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Joslin, D. L.; Easton, D. S.; Liu, C. T. & David, S. A. December 31, 1994.

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Description

The effects of alloy composition and reaction atmosphere on reaction synthesis of binary FeAl alloys were studied. Reactions were observed in an open (air) furnace, under static vacuum (in an evacuated quartz tube) and in a dynamic vacuum furnace. High-speed videotapes of reaction syntheses of compacts formed from 45-{mu}m Fe and 10-{mu}m Al powders reacted in air and under static vacuum revealed that an unusual ``two-stage`` reaction exists in this system under these conditions. The first stage of the two-stage reaction lasts several seconds and starts at around 650 C. The second stage begins at about 900 C, reaching temperatures between 1,250 and 1,350 C. The progress of the reaction to the second stage is sensitive to the alloy composition and reaction environment. The reaction behavior is explained in terms of thermodynamics and heat transfer, which control the delicate balance between beat accumulation and heat loss during reaction synthesis.

Physical Description

7 p.

Notes

OSTI as DE95007405

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  • Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994

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  • Other: DE95007405
  • Report No.: CONF-941144--75
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/28365 | External Link
  • Office of Scientific & Technical Information Report Number: 28365
  • Archival Resource Key: ark:/67531/metadc668918

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Creation Date

  • December 31, 1994

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Oct. 3, 2017, 1:05 p.m.

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Joslin, D. L.; Easton, D. S.; Liu, C. T. & David, S. A. The effects of processing variables on reaction synthesis of Fe-Al alloys, report, December 31, 1994; Tennessee. (digital.library.unt.edu/ark:/67531/metadc668918/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.