Engineering & Materials Science
Radioisotopes
100%
Americium
38%
Nuclear energy
30%
Hot Temperature
25%
Oxides
19%
Composite materials
18%
Sintering
15%
Spacecraft
13%
Spectroscopy
13%
Biomimetics
12%
Neodymium
11%
Bismuth
11%
Spark plasma sintering
11%
Boron carbide
10%
Self-healing materials
10%
Sandwich structures
9%
Copper
9%
Lattice constants
8%
Acoustic impedance
8%
Polymers
8%
Cerium
8%
Isotopes
8%
Platinum alloys
7%
Cerium oxide
7%
X ray diffraction analysis
7%
Materials testing
7%
Vents
7%
Failure modes
7%
Reentry
7%
Carbon carbon composites
7%
Radioactive materials
6%
Electric sparks
6%
Solid solutions
6%
Rockets
6%
Incident solar radiation
6%
Plasmas
6%
Fibers
6%
Composite structures
6%
Polycrystalline materials
6%
Powders
6%
Restoration
5%
Foams
5%
Scaffolds
5%
Epoxy resins
5%
Compressive strength
5%
Planets
5%
Crystal structure
5%
Metals
5%
Physics & Astronomy
thermoelectric generators
38%
americium
23%
americium 241
20%
heaters
20%
European Space Agency
19%
mars
14%
oxides
13%
space exploration
12%
vehicles
11%
sintering
11%
heat sources
11%
oxalates
10%
modules
10%
aerospace sciences
9%
analogs
9%
neodymium
9%
impedance
9%
reconnaissance
9%
materials selection
8%
sandwich structures
7%
metal matrix composites
7%
containment
7%
healing
7%
rockets
6%
energy sources
6%
cerium
6%
characterization
6%
spectroscopy
6%
foams
5%
synthesis
5%
pellets
5%
x rays
5%
lattice parameters
5%
sparks
5%
Earth & Environmental Sciences
radionuclide
32%
heater
19%
science
13%
americium
13%
spectroscopy
10%
nuclear power
9%
heat source
8%
program
5%
Mars
5%
containment
5%
spectrometer
5%
