Development of equipment for vacuum deposition of heat-saving thin coatings on glass

1999 ◽  
pp. 299-300
Author(s):  
Leonid L. Kolesnik ◽  
Yuri V. Panfilov ◽  
Ekaterina V. Bulygina
Keyword(s):  
Vacuum Deposition ◽  
Thin Coatings

A New Fine-Structure Observed in Electron-Diffraction Rings

1973 ◽  
Vol 31 ◽  
pp. 48-49
Author(s):  
J. M. Corbett ◽  
J. Fairchild ◽  
F. W. Boswell
Keyword(s):  
Fine Structure ◽  
Electron Diffraction ◽  
Vacuum Deposition ◽  
Smoke Particles

Fine-structure in spotty electron diffraction riiig patterns has previously been observed for specimens made up of MgO smoke particles of cubic morphology. This fine-structure was shown to arise from refraction effects in the small cubes (Sturkey & Frevel). We have recently observed a different type of fine structure in patterns from MgO films prepared by vacuum deposition (Fig. 1). This fine-structure consists of sets of regularly spaced fringes occurring at random orientations in the rings. The fringes may be seen in Fig. 2 which shows a segment of the (200) ring magnified 7x from the pattern in Fig. 1. It was considered possible that each set of fringes might arise from two superimposed diffraction’ spots from suitably situated crystallites in the specimen. Experiments have been conducted which clearly demonstrate that the fringes do in fact arise in this way.

Vacuum deposition rate and optical quality of the As2S3 films

2015 ◽  
Vol 37 (0) ◽  
pp. 89-97
Author(s):  
В. М. Жихарєв ◽  
В. Ю. Лоя ◽  
А. М. Соломон ◽  
Я. В. Грицище
Keyword(s):  
Deposition Rate ◽  
Optical Quality ◽  
Vacuum Deposition

Vacuum Deposition of Hg0.8Cd0.2Te

1971 ◽  
Vol 42 (6) ◽  
pp. 2487-2493 ◽  
Author(s):  
D. K. Hohnke ◽  
H. Holloway ◽  
E. M. Logothetis ◽  
R. C. Crawley
Keyword(s):  
Vacuum Deposition

scholarly journals Study on the Influence of the Ball Material on Abrasive Particles’ Dynamics in Ball-Cratering Thin Coatings Wear Tests

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 668
Author(s):  
Gustavo Pinto ◽  
Andresa Baptista ◽  
Francisco Silva ◽  
Jacobo Porteiro ◽  
José Míguez ◽  
...  
Keyword(s):  
Aisi 304 ◽  
Thin Coatings ◽  
Iron And Steel ◽  
Test Configuration ◽  
Abrasive Particles ◽  
Aisi 52100 ◽  
Aisi 304 Steel ◽  
Aisi 52100 Steel ◽  
Steel Balls ◽  
Particles Dynamics

Micro-abrasion remains a test configuration hugely used, mainly for thin coatings. Several studies have been carried out investigating the parameters around this configuration. Recently, a new study was launched studying the behavior of different ball materials in abrasive particles’ dynamics in the contact area. This study intends to extend that study, investigating new ball materials never used so far in this test configuration. Thus, commercial balls of American Iron and Steel Institute (AISI) 52100 steel, Stainless Steel (SS) (AISI) 304 steel and Polytetrafluoroethylene (PTFE) were used under different test conditions and abrasive particles, using always the same coating for reference. Craters generated on the coated samples’ surface and tracks on the balls’ surface were carefully observed by Scanning Electron Microscopy (SEM) and 3D microscopy in order to understand the abrasive particles’ dynamics. As a softer material, more abrasive particles were entrapped on the PTFE ball’s surface, generating grooving wear on the samples. SS AISI 304 balls, being softer than the abrasive particles (diamond), also allowed particle entrapment, originating from grooving wear. AISI 52100 steel balls presented particle dynamics that are already known. Thus, this study extends the knowledge already existing, allowing to better select the ball material to be used in ball-cratering tests.

scholarly journals Bio-based polyurethane nanocomposite thin coatings from two comparable POSS with eight same vertex groups for controlled release urea

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lixia Li ◽  
Meng Wang ◽  
Xiandong Wu ◽  
Wenping Yi ◽  
Qiang Xiao
Keyword(s):  
In Situ Polymerization ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Poly Ethylene Glycol ◽  
Thin Coatings ◽  
Polyurethane Coatings ◽  
Coated Urea ◽  
Poly Ethylene ◽  
Coated Fertilizer ◽  
Polyurethane Matrix

AbstractNanocomposite modification has attracted much attention in improving properties of bio-based polymer coating material for coated fertilizer. Herein two comparable polyhedral oligomeric silsesquioxanes (POSS), with eight poly(ethylene glycol) (PEG) and octaphenyl groups attached to the cage, respectively, were successfully incorporated into thin castor oil-based polyurethane coatings via in-situ polymerization on the urea surface. The nanostructure coatings are environmentally friendly, easy to prepare, and property-tunable. The results show that the vertex group of POSS had a pronounced influence on dispersion level and interaction between polyurethane and POSS that well-tuned the release pattern and period of coated urea, even at the coating rate as low as of 2 wt%. The liquid POSS with long and flexible PEG groups had better compatibility and dispersibility in polyurethane matrix than the solid POSS with rigid octaphenyl groups, as evidenced by SEM/EDS. The unique properties were resulted from the different extents of physical crosslinkings. This modification of bio-based polyurethane coating with POSS provided an alternative method of regulating and controlling the properties of coated fertilizer.

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