Dear Gagan,

Its depend on type of reinforcements and end use etc.

for e.g. Injection molding:fiber breakage but In compression molding long fiber based PEEK composite superior.

For short fiber Injection molding technique is leading.

For Nano composite compression molding is good as nano filler is costly and injection molding required threshold amount to fabricate.

You may look at the review article

Article A review on PEEK composites – Manufacturing methods, propert...

HVOF sprays them as a powder. Ball mill PEEK and the reinforcing phase together and spray deposit the resulting composite particles.