Cyclic impact compaction of ultra high molecular weight polyethylene powder

Cyclic Impact Compaction of an Ultra High Molecular Weight Polyethylene (UHMWPE) Powder and Properties of the Compacts

“…However, as experiments have shown, at an energy of 983 J, the load on the elements of the impact device becomes too high; some parts often fail and require replacement. In our opinion, from the point of view of the operability of the impact device, the impact energy of 900 J, at which the experiments described in [ 18 ] were carried out, can be recommended as the maximum for compacting the UHMWPE powder. Since, according to Table 1 , the strength of the compact still remains quite high at an impact energy of 655 J, this energy can be recommended as the minimum for compacting this powder by the CIC technique.…”

“…The UHMWPE powder from which the samples were made by the CIC method was GUR 4120 (Ticona GmbH, Frankfurt, Germany) with a particle size of 120–140 μm and molar mass of 5·10 6 g/mol. The CIC method was described in our previous works [ 18 , 19 , 20 ], where the results of producing compacts from pure UHMWPE GUR 4150, as well as UHMWPE-based composites with micro- and nano-additives and with reinforcing metal inserts are presented. The additives used in [ 18 ] were TiO 2 (brand R-FC5), SiO 2 (Rosil-175 silica filter) and technical SiC powders with an average particle size of 180 nm, 17 nm and 10 μm, respectively.…”

“…The CIC method was described in our previous works [ 18 , 19 , 20 ], where the results of producing compacts from pure UHMWPE GUR 4150, as well as UHMWPE-based composites with micro- and nano-additives and with reinforcing metal inserts are presented. The additives used in [ 18 ] were TiO 2 (brand R-FC5), SiO 2 (Rosil-175 silica filter) and technical SiC powders with an average particle size of 180 nm, 17 nm and 10 μm, respectively. In this work, we used as an additive nanoscale detonation carbon (NDC) whose production method and properties are described in [ 33 , 34 , 35 ].…”

“…Additionally, it is possible to create a static force of 4 tons for pre-pressing the processed powder. According to [ 17 , 18 ], the UHMWPE consolidation process during shock treatment consists of two stages. At the first stage, after a certain number of impacts, the material is compacted to almost zero porosity; at the second stage, melting occurs at the boundaries of the particles, and their welding as a result of recrystallization during cooling.…”

“…A further development of the cyclic impact compaction (CIC) method was presented in [ 18 , 19 , 20 ]. In 2004, the possibility of shock-wave compaction (a compaction method based on the use of high explosives) of UHMWPE powders was reported [ 21 ].…”