scholarly journals Improving the lubricating properties of transmission oils by activating the processes of boundary films formation

2021 ◽  
Vol 1029 ◽  
pp. 012002
Author(s):  
A G Ponomarenko ◽  
T G Boiko ◽  
A A Bicherov ◽  
A V Bicherov ◽  
T A Shiryaeva ◽  
...  
Keyword(s):  
Boundary Films ◽  
Lubricating Properties

Lubricating Properties of Boundary Films in Tribosystems under Critical Operation Conditions

2021 ◽  
Vol 50 (3) ◽  
pp. 229-235
Author(s):  
R. G. Mnatsakanov ◽  
O. A. Mikosianchyk ◽  
O. E. Yakobchuk ◽  
B. D. Khalmuradov
Keyword(s):  
Operation Conditions ◽  
Boundary Films ◽  
Lubricating Properties

TEM Studies of Grain Boundary Films in Si3N4 Ceramics

1991 ◽  
Vol 49 ◽  
pp. 930-931
Author(s):  
H.-J. Kleebe ◽  
J.S. Vetrano ◽  
J. Bruley ◽  
M. Rühle
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Hot Isostatic Pressing ◽  
Amorphous Film ◽  
Liquid Phase Sintering ◽  
Second Phase ◽  
High Temperature Mechanical Properties ◽  
Triple Points ◽  
Boundary Films

It is expected that silicon nitride based ceramics will be used as high-temperature structural components. Though much progress has been made in both processing techniques and microstructural control, the mechanical properties required have not yet been achieved. It is thought that the high-temperature mechanical properties of Si3N4 are limited largely by the secondary glassy phases present at triple points. These are due to various oxide additives used to promote liquid-phase sintering. Therefore, many attempts have been performed to crystallize these second phase glassy pockets in order to improve high temperature properties. In addition to the glassy or crystallized second phases at triple points a thin amorphous film exists at two-grain junctions. This thin film is found even in silicon nitride formed by hot isostatic pressing (HIPing) without additives. It has been proposed by Clarke that an amorphous film can exist at two-grain junctions with an equilibrium thickness.

MEEHANITE GD

Alloy Digest ◽  
1964 ◽  
Vol 13 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Damping Capacity ◽  
Iron And Steel ◽  
Lubricating Properties

Abstract MEEHANITE-GD is a high strength iron casting having high damping capacity, self-lubricating properties, and good machinability. It combines the good properties of both cast iron and steel. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on casting, heat treating, machining, and joining. Filing Code: CI-32. Producer or source: Meehanite Metal Corporation.

MEEHANITE GA

Alloy Digest ◽  
1954 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Machine Tools ◽  
High Strength ◽  
Heat Treating ◽  
Damping Capacity ◽  
Iron And Steel ◽  
Lubricating Properties

Abstract MEEHANITE GA is a high strength iron casting having high damping capacity, self-lubricating properties, and good machinability. It combines the good properties of both cast iron and steel. Applications include machine tools, gears, shafts, and housings. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on heat treating and machining. Filing Code: CI-5. Producer or source: Meehanite Metal Corporation.

Essential Research in Machining Difficult-to-Machine Materials for Advancing MQL Cutting Technology with a Newly Developed Coated Tool

2014 ◽  
Vol 1017 ◽  
pp. 329-333
Author(s):  
Syunki Shimada ◽  
Masao Kohzaki
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Cutting Tool ◽  
Minimum Quantity Lubrication ◽  
High Wear Resistance ◽  
Cutting Resistance ◽  
Coated Tools ◽  
Coated Tool ◽  
Cutting Experiments ◽  
Lubricating Properties

This study is developing environmentally friendly cutting technologies of difficult-to-machine materials by MQL (Minimum Quantity Lubrication) cutting with Ti-B coated tools. In this research, we performed cutting experiments of difficult-to-machine materials in dry, MQL and wet conditions with non-coated tools. Cutting resistance in the MQL cutting was almost the same as that in the wet cutting. Moreover, damage of the cutting tool was not observed after the MQL cutting. Therefore the MQL cutting is expected to become an advanced cutting technology by using Ti-B coated tools because Ti-B film had high temperature lubricating properties and high wear resistance.

Grain Boundary Films in Boron Steels

JOM ◽  
1953 ◽  
Vol 5 (3) ◽  
pp. 445-446
Author(s):  
J. W. Spretnak ◽  
Rudolph Speiser
Keyword(s):  
Grain Boundary ◽  
Boundary Films ◽  
Boron Steels

scholarly journals The relevance of lubricating properties indicator into the Russian standard for civil aviation jet fuels introduction

2021 ◽  
Vol 1942 (1) ◽  
pp. 012063
Author(s):  
K I Gryadunov ◽  
A N Kozlov ◽  
I S Melnikova ◽  
A N Timoschenko ◽  
K E Balishin
Keyword(s):  
Civil Aviation ◽  
Jet Fuels ◽  
Lubricating Properties

The effect of deactivated phospholipids on joints lubrication: Osteoarthritis and lubricating properties

2021 ◽  
Vol 3 (6) ◽  
pp. 01-03
Author(s):  
Z. Pawlak
Keyword(s):  
Articular Cartilage ◽  
Joint Inflammation ◽  
Phospholipid Content ◽  
Lubrication Mechanism ◽  
Hydration Mechanism ◽  
Synovial Joints ◽  
Lamellar Phases ◽  
Supportive Role ◽  
Synovial Fluids ◽  
Lubricating Properties

PLs bilayers coating the major synovial joints such as knees and hips as the lubricant are responsible for the lubrication of articular cartilage. Lamellar-repulsive effect has been considered as a lubrication mechanism but it is likely that lubricin and hyaluronan with PLs participate in the lubrication process. The molecules of lubricin and hyaluronan adsorbed by PLs have a supportive role and provide the efficient lubrication of synovial joints via the hydration mechanism (~ 80% water content). Lipid profiles of injured and healthy knees’ synovial fluids show significant differences. The phospholipid content in synovial fluid (SF) during joint inflammation, osteoarthritis is significantly higher (2 to 3 times) above the normal concentration of PL, and has a poor boundary-lubricating ability because of deactivated PL molecules. Deactivated PL molecule has no ability to form bilayers, lamellar phases, and liposomes.

Lubricating Properties of Ammonium-Based Protolytic Ionic Liquids in Friction Pairs Based on Different Metals

2021 ◽  
Vol 42 (3) ◽  
pp. 152-159
Author(s):  
R. Kreivaitis ◽  
M. Gumbytė ◽  
A. Kupčinskas ◽  
K. Kazancev ◽  
V. Jankauskas ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Lubricating Properties
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