Which of the following metals is used as the matrix metal in nearly all WC cemen

Question

Which of the following metals is used as the matrix metal in nearly all WC cemented carbides (cermets)? (a)aluminum, (b) chromium, (c) cobalt, (d) silver, (e) tungsten Match the number with the description of the following polymers (h) Vulcanize rubber (i) Polypropylene (j) Polyvinylchloride (k) octane Mer uit Mer unit Mer unit H CH H CH3 A polymer for the surface of a non-sticking pan Which of the following processes is not associated with the production of plastic sheet and film (more than one)? (a) blown-film extrusion process, (b) calendering (c) chill-roll extrusion, (d) doctor blade method, or (e) slit-die extrusion. In powder lurgy, as particle size increases, interparticle friction (a) increases, or (b) decreases A screen with 325 mesh count has wires with a diameter of 0.001377 in (a) the maximum particle size that will pass through the wire mesh is....... (c) the percent open space is..

Explanation / Answer

Ans 1 : c) cobalt

Typically three elements nickel, cobalt and molybdenum are used as the metals in cermets.

These cermets are used instead of tungsten carbides.

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