Engineering & Materials Science
Spur gears
100%
Fatigue of materials
65%
Friction
63%
Wear of materials
51%
Steel
50%
Lubrication
45%
Gears
44%
Temperature
36%
Gear teeth
28%
Oils
24%
Lubricants
22%
Coatings
22%
Lubricating oils
21%
Vacuum
21%
Shot peening
20%
Graphene oxide
19%
Alumina
19%
Plating
18%
Water
16%
Diamonds
15%
Residual stresses
14%
Failure modes
14%
Shear stress
14%
Surface treatment
13%
Aluminum oxide
13%
Hardness
13%
Dynamic loads
12%
Durability
12%
Stainless steel
11%
Polyimides
11%
Hot Temperature
11%
Spalling
10%
Surface roughness
10%
Polytetrafluoroethylenes
10%
Forging
10%
Wear resistance
9%
Carbon nanotubes
9%
Tungsten carbide
9%
Bolts
9%
Thrust bearings
9%
Pitting
9%
Carbon
8%
Gaskets
7%
Powders
7%
Washers
7%
Carbides
7%
Rollers (machine components)
7%
Roller bearings
7%
Steel ingots
6%
Tool steel
6%
Chemical Compounds
Forging
33%
Residual Stress
30%
Fatigue Strength
29%
Friction Coefficient
28%
Wear
24%
Lubrication
23%
Bearing
23%
Shear Stress
19%
Ceramic
17%
Force
14%
Coating Agent
12%
Lubricating Oil
12%
Surface
11%
Heat Treatment
11%
Polyimide Macromolecule
9%
Grain Size
8%
Vacuum
8%
Poly(tetrafluoroethylene)
7%
Graphene Oxide
7%
Carbon Nanotube
6%
Liquid Film
5%
Purity
5%
Pressure
5%
Physics & Astronomy
steels
29%
rollers
22%
balls
15%
lubricating oils
14%
scoring
12%
aluminum oxides
11%
fatigue life
11%
forging
11%
coatings
9%
ceramics
9%
space power unit reactors
9%
residual stress
9%
coefficient of friction
8%
sliding
7%
oils
7%
evaluation
5%
spalling
5%
punches
5%
shear stress
5%