Niobium Phase Diagrams : Manuscript Report on Niobium-Carbon System

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Description

Abstract: "The niobium-carbon system has been determined by X-ray and metallographic examination of sintered and arc-cast alloys. Two carbides exist: hexagonal Nb2C with a limited range of homogeneity, and cubic NbC with a solubility range from 8.25 to 10.25 weight per cent carbon. Dilute alloys freeze by eutectic reaction at 2230 C. The solubility of carbon in niobium is 0.80 at the eutectic temperature, but this decreases rapidly with temperature. Metallographic evidence indicates a peritectic reaction between melt, Nb2C, and NbC; alloys richer in carbon than NbC freeze by eutectic reaction."

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29 p. : ill., tables. ; 28 cm.

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Elliott, Rodney P. May 6, 1959.

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  • Main Title: Niobium Phase Diagrams : Manuscript Report on Niobium-Carbon System
  • Added Title: ARF (Series) (Chicago, Illinois) Report 2120-4
  • Series Title: Armour Research Foundation Reports
  • Added Title: Armour Research Foundation Report ARF-2120-4

Description

Abstract: "The niobium-carbon system has been determined by X-ray and metallographic examination of sintered and arc-cast alloys. Two carbides exist: hexagonal Nb2C with a limited range of homogeneity, and cubic NbC with a solubility range from 8.25 to 10.25 weight per cent carbon. Dilute alloys freeze by eutectic reaction at 2230 C. The solubility of carbon in niobium is 0.80 at the eutectic temperature, but this decreases rapidly with temperature. Metallographic evidence indicates a peritectic reaction between melt, Nb2C, and NbC; alloys richer in carbon than NbC freeze by eutectic reaction."

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29 p. : ill., tables. ; 28 cm.

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Digitized from microopaque cards (1).

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  • OCLC: 914234057
  • SuDoc Number: Y 3.AT 7:22/ARF-2120-4
  • Report No.: ARF-2120-4
  • Grant Number: AT(11-1)-515
  • Archival Resource Key: ark:/67531/metadc502428

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  • May 6, 1959

Added to The UNT Digital Library

  • Feb. 12, 2018, 7:42 a.m.

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  • April 23, 2019, 4:48 p.m.

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Elliott, Rodney P. Niobium Phase Diagrams : Manuscript Report on Niobium-Carbon System, report, May 6, 1959; Chicago, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc502428/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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