Question

Plasma is metal spraying can obtain temperatures up to ________

(a) 10,000 F

(b) 20,000 F

(c) 30,000 F

(d) 60,000 F

The question was posed to me in homework.

This intriguing question originated from Metal Spraying and Hard Facing, Age Hardening in division Wear of Metals, Mechanical Properties and Testing of Engineering Material & Metallurgy

Answer 1

Right choice is (c) 30,000 F

Best explanation: Plasma is a luminous stream of ionized gas produced by passing a gas through an electric arc. Temperatures up to 30,000 F are economically obtained. Thus, the use of plasma permits deposition of the highest melting metals.