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709. Mass spectrum of yttrium chloride vapour
Classified abstracts 701--709 30B5 3-stage oil b o o s t e r p u m p s , each b a c k e d by two S180 L e y b o l d r o t a r y p u m p s giving a total p u m p i n g speed o f 20,000 1/sec at 1 m i c r o n . T h e individual e l e m e n t s are c o n t a i n e d in h o p p e r s in a separately e v a c u a t e d c h a m b e r so t h a t they c a n be r e - c h a r g e d while m e l t i n g is proceeding. A n i m m e r s i o n t h e r m o c o u p l e a n d an alloys a m p l i n g device are o p e r a t e d t h r o u g h v a c u u m locks. T h e article gives details o f a typical o p e r a t i n g cycle. T h e metallurgical a d v a n tages o f t h e p l a n t derive f r o m the s u p p r e s s i o n o f the n o r m a l gas - m e t a l a n d gas - slag r e a c t i o n s so t h a t inclusions are eliminated a n d the p r o d u c t is clean. H i g h l y reactive e l e m e n t s s u c h as t i t a n i u m a n d a l u m i n i u m can be a d d e d in large a m o u n t s w i t h o u t the f o r m a tion o f oxides a n d nitrides; for example, the a d d i t i o n o f these two e l e m e n t s in a m o u n t s u p to 10 per cent p r o m o t e s h i g h creep s t r e n g t h in s o m e alloys. Anon, Engineer, 219 (5699), April 1965, 677 678. 37 : 41 701. Gas release accompanying inoculation of liquid cast iron.
4O 706. Experimental oscillator strengths of CO and CO t. (USA) R P Sehwenker, J Chem Phys, 42 (6), March 1965, 1895
1897. 40 707. Calculated elastic scattering cross sections for the Li - He system. (USA) G G Weber and R B Berstein, J Chem Phys, 42 (6), March 1965,
2166-2171. 40 708. Organic ions in the gas phase. XV: Decomposition on n-alkanes under electron impact. (USA) S Meyerson, J Chem Phys, 42 (6), March 1965, 2181-2186. 40 : 37 709. Mass spectrum of yttrium chloride vapour. (USA) J D McKinley, J Chem Phys, 42 (6), March 1965, 2245--2246.
(USSR) T h e installation c o n s i s t e d o f a v a c u u m i n d u c t i o n f u r n a c e (10 * torr), w o r k i n g in c o n j u n c t i o n with a m a s s s p e c t r o m e t e r . T h e results s h o w t h a t gas e v o l u t i o n is the result o f a b s o r p t i o n of the i n o c u l a t i n g a g e n t o n t h e g r a p h i t e flakes in the cast iron. T h e effect o f this a b s o r p t i o n on g r a p h i t e g r o w t h requires f u r t h e r study. V T Burtsev et al, Foundry Manufacture Jl, (3), 1965, 23, (in
Russian). 37
702. Consumable electrode furnace. (Great Britain) Anon, Engineer, 218 (5681), Dee 1964, 989. 37 703. Production of vacuum-melted metals and alloys in Pennsylvania.
(Great Britain) Anon, Engineer, 218 (5683), Dec 1964, 1073-1074.
38. Distillation, organic chemistry, isotopic gas analysis 38 : 40 : 22 704. The isotopic analysis of argon with a Philips omegatron.
(Great Britain) T h e a u t h o r describes certain characteristics of the Philips o m e g a t r o n as used for t h e isotopic analysis of a r g o n . T h i s analysis is q u a n t i t a t i v e p r o v i d e d the s u m o f the positive ionic c u n e n t s o f the a r g o n i s o t o p e s does n o t exceed 2 × 10 -~z A with a n e m i s s i o n c u r r e n t of 1 tzA. U p p e r limit of total p r e s s u r e for use of i n s t r u m e n t for q u a n t i t a t i v e analysis is 2 x 10 -7 torr. L o w e r limit o f press'arc o f a r g o n t h a t c a n be detected is 3 × 10 -x3 torr. R e s o l v i n g power: 33(4000 G a u s s ) ; 60 (9000 G a u s s ) . T h e p o o r resolving p o w e r o f t h e o m e g a t r o n , the c o m p l e x i t y o f its f u n c t i o n i n g a n d the low gas p r e s s u r e s required for q u a n t i t a t i v e m e a s u r e m e n t s , limit its application to m o r e specialised p r o b l e m s t h a n is t h e case for an o r d i n a r y m a s s spectrometer. D K r u m m e n a c h e r , Vacuum, 14 (12), Dec 1964, 461-475.
IV. Materials and techniques used in vacuum technology 40. Gases and vapours 40
The adsorption of krypton and ethylene on evaporated film of magnesium. See a b s t r a c t n u m b e r 621. 40 Mass spectrometric study of photoionization. II: H2, H D and D2. See a b s t r a c t n u m b e r 640. 40 Dissociation ionization of molecules by rare-gas ion impact. See a b s t r a c t n u m b e r 641. 40 The isotopic analysis of argon with a Philips omegatron. See abstract n u m b e r 704. 40:19 705. Determination of ground-state O, N and H by light absorption and measurement of oscillator strengths. (USA) Anon, J Chem Phys, 42 (5), March 1965, 1785-1790.
386
4t. M e t a l s a n d a l l o y s 41 Orientation of silver films grown on vacuum cleaved rock salt. See a b s t r a c t n u m b e r 619. 41 Effect of the partial pressure of water vapour on the optical properties of thin films of calcium. See a b s t r a c t n u m b e r 643. 41 Photo current through thin films of A1203. See a b s t r a c t n u m b e r 644. 41 Stainless steel modular vacuum unit. See abstract n u m b e r 648. 41 Vapour deposited tungsten coatings on graphite. See abstract n u m b e r 669. 41 Epitaxy in thin films of EuS. See abstract n u m b e r 671. 41 Hall-effect studies in deposited CdS thin films. See abstract n u m b e r 674. 41 Cathodic sputtering of tantalum and tungsten at various temperatures. See a b s t r a c t n u m b e r 676. 41 On the durability of nickel and iron films obtained by condensation in vacuum. See a b s t r a c t n u m b e r 677. 41 Epitaxial growth of silver and gold films by sputtering. See a b s t r a c t n u m b e r 678. 41 Exploding metal films. See abstract n u m b e r 681. 41 Field emission microscopy of silver nucleation and epitaxial growth on tungsten. See a b s t r a c t n u m b e r 682. 41 Large vacuum metallising plant. See abstract n u m b e r 684. 41 Vacuum metallising plant. See a b s t r a c t n u m b e r 685. 41 Secondary electron emission from thin MgO films. See a b s t r a c t n u m b e r 689. 41 Plant for high purity alloys and for flame plating. See abstract n u m b e r 700. 41 Gas release accompanying inoculation of liquid cast iron. See a b s t r a c t n u m b e r 701. 41 Production of vacuum melted metals and alloys in Pennsylvania. See a b s t r a c t n u m b e r 703.
42. Glass, ceramics and refractory oxides 42
Desorption of He and 14CO2 from micas. See a b s t r a c t n u m b e r 628. 42 Out gases evolved from ceramics in vacuum at room temperature. See a b s t r a c t n u m b e r 697.
4O 706. Experimental oscillator strengths of CO and CO t. (USA) R P Sehwenker, J Chem Phys, 42 (6), March 1965, 1895
1897. 40 707. Calculated elastic scattering cross sections for the Li - He system. (USA) G G Weber and R B Berstein, J Chem Phys, 42 (6), March 1965,
2166-2171. 40 708. Organic ions in the gas phase. XV: Decomposition on n-alkanes under electron impact. (USA) S Meyerson, J Chem Phys, 42 (6), March 1965, 2181-2186. 40 : 37 709. Mass spectrum of yttrium chloride vapour. (USA) J D McKinley, J Chem Phys, 42 (6), March 1965, 2245--2246.
(USSR) T h e installation c o n s i s t e d o f a v a c u u m i n d u c t i o n f u r n a c e (10 * torr), w o r k i n g in c o n j u n c t i o n with a m a s s s p e c t r o m e t e r . T h e results s h o w t h a t gas e v o l u t i o n is the result o f a b s o r p t i o n of the i n o c u l a t i n g a g e n t o n t h e g r a p h i t e flakes in the cast iron. T h e effect o f this a b s o r p t i o n on g r a p h i t e g r o w t h requires f u r t h e r study. V T Burtsev et al, Foundry Manufacture Jl, (3), 1965, 23, (in
Russian). 37
702. Consumable electrode furnace. (Great Britain) Anon, Engineer, 218 (5681), Dee 1964, 989. 37 703. Production of vacuum-melted metals and alloys in Pennsylvania.
(Great Britain) Anon, Engineer, 218 (5683), Dec 1964, 1073-1074.
38. Distillation, organic chemistry, isotopic gas analysis 38 : 40 : 22 704. The isotopic analysis of argon with a Philips omegatron.
(Great Britain) T h e a u t h o r describes certain characteristics of the Philips o m e g a t r o n as used for t h e isotopic analysis of a r g o n . T h i s analysis is q u a n t i t a t i v e p r o v i d e d the s u m o f the positive ionic c u n e n t s o f the a r g o n i s o t o p e s does n o t exceed 2 × 10 -~z A with a n e m i s s i o n c u r r e n t of 1 tzA. U p p e r limit of total p r e s s u r e for use of i n s t r u m e n t for q u a n t i t a t i v e analysis is 2 x 10 -7 torr. L o w e r limit o f press'arc o f a r g o n t h a t c a n be detected is 3 × 10 -x3 torr. R e s o l v i n g power: 33(4000 G a u s s ) ; 60 (9000 G a u s s ) . T h e p o o r resolving p o w e r o f t h e o m e g a t r o n , the c o m p l e x i t y o f its f u n c t i o n i n g a n d the low gas p r e s s u r e s required for q u a n t i t a t i v e m e a s u r e m e n t s , limit its application to m o r e specialised p r o b l e m s t h a n is t h e case for an o r d i n a r y m a s s spectrometer. D K r u m m e n a c h e r , Vacuum, 14 (12), Dec 1964, 461-475.
IV. Materials and techniques used in vacuum technology 40. Gases and vapours 40
The adsorption of krypton and ethylene on evaporated film of magnesium. See a b s t r a c t n u m b e r 621. 40 Mass spectrometric study of photoionization. II: H2, H D and D2. See a b s t r a c t n u m b e r 640. 40 Dissociation ionization of molecules by rare-gas ion impact. See a b s t r a c t n u m b e r 641. 40 The isotopic analysis of argon with a Philips omegatron. See abstract n u m b e r 704. 40:19 705. Determination of ground-state O, N and H by light absorption and measurement of oscillator strengths. (USA) Anon, J Chem Phys, 42 (5), March 1965, 1785-1790.
386
4t. M e t a l s a n d a l l o y s 41 Orientation of silver films grown on vacuum cleaved rock salt. See a b s t r a c t n u m b e r 619. 41 Effect of the partial pressure of water vapour on the optical properties of thin films of calcium. See a b s t r a c t n u m b e r 643. 41 Photo current through thin films of A1203. See a b s t r a c t n u m b e r 644. 41 Stainless steel modular vacuum unit. See abstract n u m b e r 648. 41 Vapour deposited tungsten coatings on graphite. See abstract n u m b e r 669. 41 Epitaxy in thin films of EuS. See abstract n u m b e r 671. 41 Hall-effect studies in deposited CdS thin films. See abstract n u m b e r 674. 41 Cathodic sputtering of tantalum and tungsten at various temperatures. See a b s t r a c t n u m b e r 676. 41 On the durability of nickel and iron films obtained by condensation in vacuum. See a b s t r a c t n u m b e r 677. 41 Epitaxial growth of silver and gold films by sputtering. See a b s t r a c t n u m b e r 678. 41 Exploding metal films. See abstract n u m b e r 681. 41 Field emission microscopy of silver nucleation and epitaxial growth on tungsten. See a b s t r a c t n u m b e r 682. 41 Large vacuum metallising plant. See abstract n u m b e r 684. 41 Vacuum metallising plant. See a b s t r a c t n u m b e r 685. 41 Secondary electron emission from thin MgO films. See a b s t r a c t n u m b e r 689. 41 Plant for high purity alloys and for flame plating. See abstract n u m b e r 700. 41 Gas release accompanying inoculation of liquid cast iron. See a b s t r a c t n u m b e r 701. 41 Production of vacuum melted metals and alloys in Pennsylvania. See a b s t r a c t n u m b e r 703.
42. Glass, ceramics and refractory oxides 42
Desorption of He and 14CO2 from micas. See a b s t r a c t n u m b e r 628. 42 Out gases evolved from ceramics in vacuum at room temperature. See a b s t r a c t n u m b e r 697.