Results 21 to 30 of about 197,075 (354)
Cryogenic Mechanical Alloying of Poly (ether ether ketone) - Polycarbonate Composite Powders for Selective Laser Sintering [PDF]
, 1999 Mechanical alloying is a solid state processing technique traditionally used in the metallurgical industry to extend solubility limits in alloy systems. Mechanical alloying can also be used to blend polymer systems at ambient or cryogenic temperatures.
Kander, R., Schultz, J., Suchicital, C.
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A Peek Outside Our Universe [PDF]
Symmetry, 2022 According to general relativity (GR), a universe with a cosmological constant Λ, like ours, is trapped inside an event horizon, r<3/Λ. What is outside? We show, using Israel (1967) junction conditions, that there could be a different universe outside. Our universe looks like a black hole for an outside observer. Outgoing radial null geodesics cannot
Enrique Gaztañaga, Pablo Fosalba
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Tribology Online, 2008 The tribological properties of poly(ether-ether-ketone) (PEEK) against steel was evaluated by a ring-on-flat type tribo-test under rotating motion. Addition of poly(tetrafluoroethlene) (PTFE) as solid lubricants improved the load-carrying capacity of the
Ichiro Minami +5 more
doaj +1 more source
Enhancement of wear properties of a polyether ether ketone polymer by incorporation of carbon and glass fibers [PDF]
, 2019 Some properties of polymers can be improved through the incorporation of carbon and glass fibers into the polymer matrix. In this research, the wear resistance of two polymer composites CF-polyether ether ketone (PEEK) and GF-PEEK were compared with the ...
Davim J. P. +15 more
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Journal of Pharmacy and Bioallied Sciences, 2023 The objective of this study is to compare retention capacity of mandibular implant-supported overdenture with all zirconia, zirconia–PEEK, and all PEEK telescopic attachments. Sixty acrylic resin models of mandible were used. Telescopic attachment system
Gujjalapudi Mahalakshmi +6 more
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3D Finite Element Analysis of Implant-supported Fixed Partial Denture Frameworks Fabricated from Fiber-reinforced Composite and Polyetheretherketone. [PDF]
Al-Rafidain Dental JournalAims: This study aimed to test different design parameters for ISFPD frameworks fabricated from fiber-reinforced composite and polyetheretherketone. Material and Methods: 12 different framework digital designs made using the AutoCAD program were sent to ...
Azher Mazin Agha +2 more
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A novel bioactive PEEK/HA composite with controlled 3D interconnected HA network [PDF]
, 2015 Polyetheretherketone (PEEK) is a high-performance thermoplastic biomaterial which is currently used in a variety of biomedical orthopaedic applications. It has comparable tensile and compressive strength to cortical bone with favourable biocompatibility.
Vaezi, Mohammad, Yang, Shoufeng
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Mechanical Engineering Journal, 2017 Effects of surface roughness of polyether ether ketone (PEEK) on the seizure behaviors of PEEK/steel pairs are studied using a block-on-ring wear tester under oil-lubricated conditions.
Tomoharu AKAGAKI +4 more
doaj +1 more source
Notre Dame Journal of Formal Logic, 1997 In `On the cohomology of impossible figures' [Topologie Struct. 17, 11-16 (1991; Zbl 0743.52002)] \textit{R. Penrose} provides a mathematical analysis of certain geometrically impossible objects. Essentially, they are those whose parts cannot be consistently assembled, as is expressed by the failure of certain equations to have solutions.
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Hydroxyapatite-incorporation improves bone formation on endosseous PEEK implant in canine tibia
Journal of Applied Biomaterials & Functional Materials, 2020 Background: Poly Ether Ether Ketone (PEEK) has been considered as a potential alternative material for endosseous dental implants, for its low elastic modulus, biocompatibility, and low cost in customized device manufacture.
Yuan-ming Geng +5 more
doaj +1 more source