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Which class of engineering ceramics generally includes lubricant materials?

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Which class of engineering ceramics generally includes lubricant materials?

(a) Sulphides

(b) Carbides

(c) Metalloids

(d) Intermetallics

This question was addressed to me in an interview.

My doubt stems from Ceramics topic in portion Non Metallic Materials of Engineering Material & Metallurgy

1 Answer

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Best answer
Correct option is (a) Sulphides

Best explanation: Molybdenum disulfide (MoS2) and tungsten disulfide (WS2) are common sulfide materials used in lubrication. Metalloid elements like germanium and silicon are used as electronic devices. Intermetallics like Nickel aluminide are used in water coatings.

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