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122. Metals grow together in high vacuum
27
Classified Abstracts 113-I 24
Materials 40.
and Techniques
Gases and Vapours
used
40
113. Heat conductivity of polyatomic and polar gases. E. A. Mason and L. Monchick, J. Chem. Phvs.. _. 36. 15 March 1962, 1622-1639.
40 114. Dissociation of halogens in shock waves. Hiroyuki Kiroaka and R. Hardwick, J. Chem. Phys., 36, 1 April 1962, 1715-1720. 40 115. Shock-tube measurement of dissociation rates of hydrogen. R. W. Patch, J. Chem. Phys., 36, 1 April 1962,1919-1924. 40 116. Kinetics of condensation of water vapor. W. G. Courtney, J. Chem. Phys., 36, 15 April 1962, 2018-2025. 40 117. Higher ionization potentials of NO,. Y. Tanaka and A. S. Jursa, J. Chem. Phys., 36, 1 May, 1962, 2493-2497. 40 118. Continuum radiation from ionized rare gases in reflected shock waves. F. H. Mies, J. Chem. Phys., 37 (5), 1 Sept. 1962, 1101-1111. 40 119. Total collision cross sections for scattering of thermal beams of hydrogen, hydrogen atoms, and helium by hydrogen and helium. H. Harrison, J. Chem. Phys., 37 (5), 1 Sept. 1962, 1164-l 165. 40 120. Determination of gaseous-diffusion coefficients from viscosity measurements. S. Weissman and E. A. Mason, J. Chem. Phys., 37 (6), 15 Sept. 1962, 1289-1300. 40 121. Adsorption of hydrogen on a (110) nickel surface. L. H. Germer and A. U. MacRae, J. Chem. Phys., 37 (7), 1 Oct. 1962, 1382-1386. 40 : 30 Interactions of gases with evaporated germanium films between 78 and 373°K. See Abstr. No. 76. 40 : 33 Lifetime of the metastable *P state of the nitrogen atom. See Abstr. No. 89.
41.
Metals and Alloys
41 : 45 122. Metals grow together in high vacuum. Great Britain. A novel welding technique carried out in a high vacuum chamber has been developed by the National Research Corporation. It requires only very moderate temperatures and contact pressures but very high vacua (lo-# to lo-lo torr). Two pieces of copper at 200°C were joined under these conditions, the weld having 95 per cent of the original strength of the material. Even when welded at room temperatures, the cohesion amounted to 35 per cent. It appears that the close approach of the surfaces under conditions of high vacuum causes the molecules to interlock to produce a homogeneous piece of metal with no change of crystal structure or variation of crystal properties across the joint. w. 1. s. Anon., New Scientist, 14 (292), 21 June 1962, 649.
in Vacuum
Technology
41 123. Vacuum adhesion of metals. United States. American scientists working at the Goddard Space Flight centre, Maryland, have investigated the adhesion of atomically clean metals brought together in a high vacuum (lO-11 torr) at room temperature under the influence of a negligible contact force. The metal samples were in the form of a small plate and thin rod, and the degree of adhesion was measured by means of a strain gauge. Pairs of metals which showed satisfactory adhesion were : aluminium/iron, copper/silver, The following pairs nickel/copper and nickel/molybdenum. refused to weld under these conditions : copper/molybdenum, silver/molybdenum, silver/iron, silver/nickel and germanium/ w. J. s. germanium. Anon., New Scientist, 15 (296), 19 July 1962, 157. 41 : 16 Epitaxial growth of metals on rock-salt faces cloven in vacuum. See Abstr. No. 5. 41 : 7 Adsorption of carbon dioxide on nickel and the influence of adsorbed species on subsequent hydrogen chemisorption. See Abstr. No. 7. New industrial thickness gauge for film deposits. No. 55.
41 : 30 See Abstr.
41 : 30 Curie temperature of evaporated nickel films. See Abstr. No. 59. 41 : 30 Very low coersive force in nickel-iron films. See Abstr. No. 62 Aggregate structure in thin nickel films. Precision films for electronic components.
41 : 30 See Abstr. No. 63. 41 : 30 See Abstr. No. 65.
41 : 30 Properties and preparation of thin antimony films of high uniformity. See Abstr. No. 75. 41 : 30 : 32 New aspect of cyclotron resonance in thin metallic films. See Abstr. No. 80. 41 : 30 : 33 : 42 Electron diffraction study of evaporated films of nickel and cobalt. See Abstr. No. 86. Progress in beryllium metallurgy. Sodium without electrolysis.
42.
Glass, Ceramics
41 : 37 See Abstr. No. 100.
See Abstr. No. 104.
and Refractory
41 : 37 : 53
Oxides
42 : 30 : 33 : 41 Electron diffraction study of evaporated films of nickel and cobalt. See Abstr. No. 86.
44.
Waxes,
Lubricants, Cements, Lacquers, Paints, Oils
124. Molybdenum disulfide. New type of lubricant. R. C. A. Thurston, MetalProp., 81 (5), May 1962,140-144.
44
Classified Abstracts 113-I 24
Materials 40.
and Techniques
Gases and Vapours
used
40
113. Heat conductivity of polyatomic and polar gases. E. A. Mason and L. Monchick, J. Chem. Phvs.. _. 36. 15 March 1962, 1622-1639.
40 114. Dissociation of halogens in shock waves. Hiroyuki Kiroaka and R. Hardwick, J. Chem. Phys., 36, 1 April 1962, 1715-1720. 40 115. Shock-tube measurement of dissociation rates of hydrogen. R. W. Patch, J. Chem. Phys., 36, 1 April 1962,1919-1924. 40 116. Kinetics of condensation of water vapor. W. G. Courtney, J. Chem. Phys., 36, 15 April 1962, 2018-2025. 40 117. Higher ionization potentials of NO,. Y. Tanaka and A. S. Jursa, J. Chem. Phys., 36, 1 May, 1962, 2493-2497. 40 118. Continuum radiation from ionized rare gases in reflected shock waves. F. H. Mies, J. Chem. Phys., 37 (5), 1 Sept. 1962, 1101-1111. 40 119. Total collision cross sections for scattering of thermal beams of hydrogen, hydrogen atoms, and helium by hydrogen and helium. H. Harrison, J. Chem. Phys., 37 (5), 1 Sept. 1962, 1164-l 165. 40 120. Determination of gaseous-diffusion coefficients from viscosity measurements. S. Weissman and E. A. Mason, J. Chem. Phys., 37 (6), 15 Sept. 1962, 1289-1300. 40 121. Adsorption of hydrogen on a (110) nickel surface. L. H. Germer and A. U. MacRae, J. Chem. Phys., 37 (7), 1 Oct. 1962, 1382-1386. 40 : 30 Interactions of gases with evaporated germanium films between 78 and 373°K. See Abstr. No. 76. 40 : 33 Lifetime of the metastable *P state of the nitrogen atom. See Abstr. No. 89.
41.
Metals and Alloys
41 : 45 122. Metals grow together in high vacuum. Great Britain. A novel welding technique carried out in a high vacuum chamber has been developed by the National Research Corporation. It requires only very moderate temperatures and contact pressures but very high vacua (lo-# to lo-lo torr). Two pieces of copper at 200°C were joined under these conditions, the weld having 95 per cent of the original strength of the material. Even when welded at room temperatures, the cohesion amounted to 35 per cent. It appears that the close approach of the surfaces under conditions of high vacuum causes the molecules to interlock to produce a homogeneous piece of metal with no change of crystal structure or variation of crystal properties across the joint. w. 1. s. Anon., New Scientist, 14 (292), 21 June 1962, 649.
in Vacuum
Technology
41 123. Vacuum adhesion of metals. United States. American scientists working at the Goddard Space Flight centre, Maryland, have investigated the adhesion of atomically clean metals brought together in a high vacuum (lO-11 torr) at room temperature under the influence of a negligible contact force. The metal samples were in the form of a small plate and thin rod, and the degree of adhesion was measured by means of a strain gauge. Pairs of metals which showed satisfactory adhesion were : aluminium/iron, copper/silver, The following pairs nickel/copper and nickel/molybdenum. refused to weld under these conditions : copper/molybdenum, silver/molybdenum, silver/iron, silver/nickel and germanium/ w. J. s. germanium. Anon., New Scientist, 15 (296), 19 July 1962, 157. 41 : 16 Epitaxial growth of metals on rock-salt faces cloven in vacuum. See Abstr. No. 5. 41 : 7 Adsorption of carbon dioxide on nickel and the influence of adsorbed species on subsequent hydrogen chemisorption. See Abstr. No. 7. New industrial thickness gauge for film deposits. No. 55.
41 : 30 See Abstr.
41 : 30 Curie temperature of evaporated nickel films. See Abstr. No. 59. 41 : 30 Very low coersive force in nickel-iron films. See Abstr. No. 62 Aggregate structure in thin nickel films. Precision films for electronic components.
41 : 30 See Abstr. No. 63. 41 : 30 See Abstr. No. 65.
41 : 30 Properties and preparation of thin antimony films of high uniformity. See Abstr. No. 75. 41 : 30 : 32 New aspect of cyclotron resonance in thin metallic films. See Abstr. No. 80. 41 : 30 : 33 : 42 Electron diffraction study of evaporated films of nickel and cobalt. See Abstr. No. 86. Progress in beryllium metallurgy. Sodium without electrolysis.
42.
Glass, Ceramics
41 : 37 See Abstr. No. 100.
See Abstr. No. 104.
and Refractory
41 : 37 : 53
Oxides
42 : 30 : 33 : 41 Electron diffraction study of evaporated films of nickel and cobalt. See Abstr. No. 86.
44.
Waxes,
Lubricants, Cements, Lacquers, Paints, Oils
124. Molybdenum disulfide. New type of lubricant. R. C. A. Thurston, MetalProp., 81 (5), May 1962,140-144.
44