INVESTIGATION OF THE ECOLOGICAL PROBLEMS OF AMMUNITION UTILIZATION AND THE DEVELOPMENT OF THE CATALYTIC METHOD TO PURIFY THE EMISSIONS FROM ITS THERMAL TREATMENT

2018 ◽  
Keyword(s):  
Thermal Treatment ◽  
Catalytic Method ◽  
Ecological Problems

scholarly journals INCREASE OF ENDURANCE AND WORKING CAPACITY OF STRUCTURAL STEEL BY ADDITIONAL CHEMICAL-THERMAL TREATMENT USING NITROGENOUS-CARBONIC CARBURIZERS

2017 ◽  
Vol 2017 (1) ◽  
pp. 25-32
Author(s):  
Николай Игнатенко ◽  
Nikolay Ignatenko ◽  
Сергей Ковалев ◽  
Sergey Kovalev ◽  
Александр Филонович ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Thermal Treatment ◽  
Case Hardening ◽  
Working Capacity ◽  
Carbon Paste ◽  
Material Fatigue ◽  
Wide Range ◽  
Ecological Problems ◽  
Steel 20 ◽  
Potassium 40

Modern methods of chemical-thermal treatment (CTT) such as cyanidation, nitrogen casehardening and others are widelyused in different branches of industry and they are processes promising enough. The solution of ecological problems of diffusion strengthening and improvement of performance attributes of a surface layer are interrelated with the use of special powder mixtures – lutes, pastes, called saturating environment (carburizer). As a saturating environment in the work there is used a nitrogen-carbon paste on the basis of fine gas black (amorphous carbon ~ 60%) and iron sinergisty potassium ~ 40% with the addition of carbamide (urea) as a nitrogen-containing component. A saturating pasty environment on the basis of soot with nitrogen-containing admixtures (urea and iron sinergisty potassium) is efficient for the surface strengthening treatment of steel products in a wide range of temperatures. Solid carbonitrides arising on the surface of products processed in this environment promote the increase of their wear-resistance and other performance attributes. A carbonitride edge on the surface of steel (20…30) ChGT arising at nitrogen case-hardening in a paste-type carburizer does not decrease wear-resistance, but, at the same time increases working capacity of parts and units and material fatigue resistance.

Pollutant Identification by Selected Area Electron Diffraction

1974 ◽  
Vol 32 ◽  
pp. 532-533
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson ◽  
C. W. Walker
Keyword(s):  
Thermal Treatment ◽  
Electron Diffraction ◽  
Sample Preparation ◽  
Crystal Structures ◽  
Water Samples ◽  
Environmental Samples ◽  
Short Review ◽  
Selected Area Electron Diffraction ◽  
Multiple Component

Selected area electron diffraction (SAD) has been used successfully to determine crystal structures, identify traces of minerals in rocks, and characterize the phases formed during thermal treatment of micron-sized particles. There is an increased interest in the method because it has the potential capability of identifying micron-sized pollutants in air and water samples. This paper is a short review of the theory behind SAD and a discussion of the sample preparation employed for the analysis of multiple component environmental samples.

Development of Crystallinity in Turbostratic Boron Nitride Derived from Polymeric Precursors

1991 ◽  
Vol 49 ◽  
pp. 954-955
Author(s):  
X. Qiu ◽  
A. K. Datye ◽  
T. T. Borek ◽  
R. T. Paine
Keyword(s):  
Thermal Treatment ◽  
Boron Nitride ◽  
Diffraction Pattern ◽  
Polymeric Precursors ◽  
Polymer Precursors ◽  
Diffuse Ring

Boron nitride derived from polymer precursors is of great interest for applications such as fibers, coatings and novel forms such as aerogels. The BN is prepared by the polymerization of functionalized borazine and thermal treatment in nitrogen at 1200°C. The BN powders obtained by this route are invariably trubostratic wherein the sheets of hexagonal BN are randomly oriented to yield the so-called turbostratic modification. Fib 1a and 1b show images of BN powder with the corresponding diffraction pattern in fig. 1c. The (0002) reflection from BN is seen as a diffuse ring with occational spots that come from crystals of BN such as those shown in fig. 1b. The (0002) lattice fringes of BN seen in these powders are the most characteristic indication of the crystallinity of the BN.

Effect of thermal treatment on Egyptian rice straw hardboard

1977 ◽  
Vol 27 (1) ◽  
pp. 93-98
Author(s):  
Naim A. Fadl ◽  
Magdi Z. Sefain ◽  
Mohomed Rakha
Keyword(s):  
Thermal Treatment ◽  
Rice Straw

Ecological problems of agriculture

2019 ◽  
Vol 330 (7) ◽  
pp. 41-42
Author(s):  
A.G. Ibragimov ◽  
Keyword(s):  
Ecological Problems
Sign in / Sign up

Export Citation Format

Share Document