PEEK Micron Powder

Catalog Number	ACMA00045181
Synonyms	Polyether Ether Ketone (PEEK) Micron Powder
Purity	0.9995
Appearance	Powder
Storage	Store at room temperature
Size	325 mesh

Case Study

Preparation of Silicon Carbide Particle Reinforced Polyetheretherketone Coating

Ajay Kumar Kadiyala, et al. Surface and Coatings Technology, 2018, 334, 124-133.

Silicon carbide (SiC) particles were used as polyetheretherketone (PEEK) reinforcements, and a composite coating was successfully prepared by electrostatic spraying. Studies have shown that the scratch hardness and adhesion of PEEK composites improve significantly as the content of SiC particles increases (the optimal concentration is around 10-15 wt%). Furthermore, nanofiller coatings perform significantly better than their micron counterparts.
Preparation of SiC-PEEK coating
· The feedstock was prepared by probe sonication in an ethanol solution. Initially, SiC particles (10-20 μm or 50-60 nm) were sonicated with pulses of 2 seconds on and 5 seconds off for a total of 30 minutes. Once the SiC particles were de-agglomerated, PEEK fine particles were added in increments and sonicated for an additional 30 minutes. The resulting suspension was dried in an oven to eliminate the solvent.
· Substrates made of stainless steel grade 316 with a roughness of 0.1 µm were chosen. Prior to coating, the substrates were degreased with acetone and dried to remove any remaining solvent. The substrate surface was ground to ensure the effective coating of charged particles using an electrostatic spray gun.
· A uniform coating thickness of 150 µm was achieved in 30 seconds at an applied voltage of 90kV and powder carrier gas pressure of 1.75 bars. The coated substrates were then placed in an oven at 370°C for 30 minutes to melt and spread the coating before allowing it to cool to ambient temperature.

Effect of Micron Graphite Particle Size on the Properties of PEEK Composites

Shang, Yingshuang, et al. High Performance Polymers, 2018, 30(2), 153-160.

Polyetheretherketone (PEEK)/graphite composites have good tribological properties. This work studied the effect of micron graphite particle size on the mechanical and tribological properties of PEEK/graphite composites at a graphite content of 25 wt%. The results show that smaller graphite particle size effectively improves wear resistance and mechanical properties by improving interfacial bonding. With the decrease of micron graphite particle size, the wear rate of PEEK composites is significantly reduced.
Preparation of PEEK/graphite composites
· The melt index of the PEEK matrix is 24 g/10 min. Different particle sizes of micron graphite include 10 μm, 50 μm, and 150 μm.
· The PEEK powder was dried at 120°C for 6 h to remove moisture. PEEK mixtures with 10, 50, and 150 μm graphite were obtained by a twin-screw extruder at 380°C.
· The composites were finally manufactured using an injection molding machine at a barrel temperature of 390°C. The injection pressure was kept constant at 900 bar, the molding temperature was fixed at 180°C, and a constant injection speed was used for all composites.

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