The Boron-Carbon System. Quarterly Report No. 3, November 1, 1960-January 31, 1961

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A definitive investigation of the boron-carbon equilibrium system is being made by x-ray diffraction, metallographic, and thermal analytical techniques. On the basis of metallogaphic and x-ray-diffraction studies it is concluded that boron carbide has a range of solubility from approximately 10 to 20 at.% carbon at 1500 to 2000 deg C. The melting point of the carbide-graphite eutectic was established as 2325 to 2350 deg C. No reversible allotropy of the beta -rhombohedral structure was observed. The solubility of carbon in boron is very small. The melting point of dilute carbon alloys is found to be essentially the same as ... continued below

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11 p.

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Elliott, R. P. February 1, 1961.

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Description

A definitive investigation of the boron-carbon equilibrium system is being made by x-ray diffraction, metallographic, and thermal analytical techniques. On the basis of metallogaphic and x-ray-diffraction studies it is concluded that boron carbide has a range of solubility from approximately 10 to 20 at.% carbon at 1500 to 2000 deg C. The melting point of the carbide-graphite eutectic was established as 2325 to 2350 deg C. No reversible allotropy of the beta -rhombohedral structure was observed. The solubility of carbon in boron is very small. The melting point of dilute carbon alloys is found to be essentially the same as that of pure boron (2040 to 2050 deg C). No metallogaphic evidence of a three-phase reaction of dilute alloys is observed. (auth)

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11 p.

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  • Other Information: Project Agreement No. 4. Orig. Receipt Date: 31-DEC-61

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  • Report No.: ARF-2200-9
  • Grant Number: AT(11-1)-578
  • DOI: 10.2172/4086142 | External Link
  • Office of Scientific & Technical Information Report Number: 4086142
  • Archival Resource Key: ark:/67531/metadc871511

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  • February 1, 1961

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 4, 2017, 7:39 p.m.

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Elliott, R. P. The Boron-Carbon System. Quarterly Report No. 3, November 1, 1960-January 31, 1961, report, February 1, 1961; United States. (digital.library.unt.edu/ark:/67531/metadc871511/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.