A small amount of thoria is doped into tungsten filament wires used in light bulbs. This is because thoria particles
A. decreases solute diffusivity
B. enhances the mobility of grain boundary
C. increases solute segregation to the grain boundary
D. are effective in limiting grain growth
Answer: Option D
This Question Belongs to Metallurgical Engineering >> Material Science In Metallurgy
Related Questions on Material Science in Metallurgy
A. creep
B. toughness
C. tensile strength
D. fatigue strength
Most important property of steels for use in automoblie bodies is
A. formability
B. yield strength
C. toughness
D. resilience
p-type semi-conductor can be obtained by doping silicon with
A. antimony
B. phosphorous
C. arsenic
D. boron
Liquid nitrogen containers can be made, from
A. ferritic stainless steel
B. HSLA steel
C. Titanium
D. Austenitic stainless steel
Join The Discussion