For preparation of porous bearings by powder metallurgy, preferred particle shape is___________________?
Correct answer: A. Spherical
- A. Spherical
- B. Nodular
- C. Irregular
- D. No preferred shape
Explanation
Spherical powder particles are preferred because they flow readily and produce a controlled, interconnected pore structure after sintering. These pores allow the bearing to retain lubricant and release it during operation.
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