It is challenging to obtain successful bonding between cemented tungsten carbide and steel due to the large differences in their physical and mechanical properties. We used spark plasma sintering (SPS) technique and successfully bonded WC-10Co and AISI4340 high-strength steel at a low temperature. The effects of sintering time (5–20 min with a gap of 5 min) on their diffusion bonding were examined. The microstructure of the bonded composite materials was evaluated, and formed phases were identified. The mechanical properties were investigated, and the importance of processing parameters of SPS was discussed. The results show a crack-free continuous metallurgical bonding achieved at 1000°C, and the bonding strength increased with increasing holding times of 5, 10, 15, and 20 min. The sintered WC-10Co powders obtained nearly full density (99.07%) with an average maximum hardness of 1763 HV5. A special arrangement was used to determine the tensile bonding-strength with maximum average
High Demand from the Construction Industry to Favour Growth of the RDP Powder Market: TMR
-
In the building and construction industry, RDP powders are commonly utilized in the making of concrete and cement repair mortar
ALBANY, N.Y., March 2, 2021 /PRNewswire/ Redispersible polymer powder refers to a type of polymer emulsion created by applying a variety of procedures to thermoplastic resin materials in powder form, including spray drying, treatment of surface, and high pressure and temperature treatment. These powders are classified as redispersible polymer powders because after being processed with water, they can disperse back into new emulsions with characteristics identical to the initial copolymer emulsions. Multiple benefits of this powder is likely to support growth of the global RDP powder market in the years to come.
P 0.05, vs PEEK).
Discussion
Because of outstanding biocompatibility and mechanical strengths, PEEK has been widely used as biomedical implants for replacing bone tissue, which is also a promising implantable material for dental applications.
27 However, because of bioinert and hydrophobicity, PEEK does not induce adhesion, proliferation, differentiation, mineralization of osteoblasts, or promote bone regeneration both in vitro and in vivo.
28 Bioactive-coated PEEK implants have become a promising bone replacement material, which combines the advantage of both bioactive coating and PEEK.
29 In this study, to endow PEEK surface with bioactivity for tissue regeneration, TP was coated on PEEK (PKTP) by VE. The results showed that the dense TP coating of PKTP (thickness of around 400 nm) was stoichiometric TP, which was tightly bonded with PEEK. Furthermore, the coating of PKTP was non-crystalline TP, showing amorphous phase. PEEK revealed a smooth surface while PKTP exhibited a rou