The Boron Carbon System Final Technical Report May 1 1960 April 30 1961 PDF Download
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| Release | : 1961 |
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Download The Boron-Carbon System. Final Technical Report, May 1, 1960-April 30, 1961 Book in PDF, ePub and Kindle
The boron--carbon equilibrium diagram was determined by x-ray, metallographic, and thermal analysis of sintered and arc-cast alloys. A single carbide having a range of solubility from approximately 9 to 20 at.% carbon and melting congruently exists in the system. The terminal solubility of carbon in boron is 0.1-0.2 at.%. The freezing reaction between boron and the carbide is a degenerate peritectic --eutectic reaction at the composition and melting temperature of elemental boron; there is a eutectic reaction at 29 at.% carbon and 2375 deg C. No allotropy of boron was observed. (auth).
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| Total Pages | : 1500 |
| Release | : 1962 |
| Genre | : Nuclear energy |
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Download Nuclear Science Abstracts Book in PDF, ePub and Kindle
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| Release | : 1961 |
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Download The Boron-Carbon System. Quarterly Report No. 3, November 1, 1960-January 31, 1961 Book in PDF, ePub and Kindle
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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| Release | : 1960 |
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Download The Boron-Carbon System. Quarterly Report No. 1 for May 1, 1960-July 31, 1960 Book in PDF, ePub and Kindle
A definitive investigation of the boron-carbon equilibrium system is being made by x-ray-diffraction, metallographic, and thermal analytical techniques. Alloys are being produced by sintering pressed powder aggregates with subsequent arc melting. Alloys were made at two at.% intervals up to 30 at.% carbcn. In the future, higher carbon compositions are to be investigated. Techniques were worked out for the metallographic preparation of the extremely hard and friable alloys. (auth).
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| Total Pages | : 332 |
| Release | : 1968 |
| Genre | : Aeronautics |
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Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
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| Release | : 1960 |
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Download The Boron-Carbon System. Quarterly Report No. 2 for August 1, 1960 - October 31, 1960 Book in PDF, ePub and Kindle
A definitive investigation of the boron-carbon equilibrium system is being made by x-ray-diffraction, metallographic, and thermal analytical techniques. Additional boron-- carbon alloys were prepared by sirtering and arc- melting compacts prepared from boron and high-purity graphite. Metallographic examinations of these alloys are in agreement with alloys previously prepared from lampblack. X-ray investigation of sintered compacts indicates that the solubility range of boron carbide extends almost to pure boron. Boron of various purities was annealed for times up to 4 hr, but no structure other than beta - rhombehedral has been detected. Very high purity boron (10 ppm impurity) was obtained for the study of allotropy and the equilibrium relationships at very dilute carbon contents. (For preceding period see ARF-2200-3.) (auth).
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| Total Pages | : 966 |
| Release | : 1963 |
| Genre | : Nuclear energy |
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Download List of References on Nuclear Energy Book in PDF, ePub and Kindle
| Author | : United States. National Aeronautics and Space Administration |
| Publisher | : |
| Total Pages | : 1318 |
| Release | : 1962 |
| Genre | : Aeronautics |
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Download Technical Publications Announcements with Indexes Book in PDF, ePub and Kindle
| Author | : International Atomic Energy Agency |
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| Total Pages | : 708 |
| Release | : 1963 |
| Genre | : Nuclear energy |
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| Author | : United States. Department of Commerce. Office of Technical Services |
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| Total Pages | : 990 |
| Release | : 1962 |
| Genre | : Government publications |
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