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in Environmental and Application Factors in Solid Friction
> Friction, Lubrication, and Wear Technology
Published: 31 December 2017
Fig. 6 Comparison of ultrahigh molecular weight polyethylene (UHMWPE) pin wear from uniaxial reciprocating motion at 2 Hz ( Fig. 3d ) and crossing motion at cycle rates of 1 and 2 Hz ( Fig. 3e ) for 2-million cycles. Source: Ref 37
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Published: 15 May 2022
Fig. 23 SEM fractographs of ultrahigh-molecular-weight polyethylene, showing the fracture surface of a specimen fracture in slow bending at ambient temperature. The direction of crack propagation is from left to right. (a) At low magnification showing layered fracture with mixture of coarse
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Published: 15 May 2022
Fig. 24 SEM fractographs of ultrahigh-molecular-weight polyethylene, showing the fracture surface of a specimen fracture under impact testing at ambient temperature. The direction of crack propagation is from left to right. (a) Flat fracture. Original magnification: 250×. (b) Flat fracture
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Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006918
EISBN: 978-1-62708-395-9
... engineering polymers. The article describes fracture mechanics solutions and approaches to the fatigue characterization of engineering polymers when dealing with macroscale fatigue crack growth. It includes mechanistic images for high-density polyethylene, ultrahigh-molecular-weight polyethylene, nylon 6, 6...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005678
EISBN: 978-1-62708-198-6
... Abstract Total joint replacement in orthopedic surgery can be achieved by excision, interposition, and replacement arthroplasty. This article details the most common materials used in total replacement synovial joints: metals, ceramics, and ultrahigh molecular weight polyethylene (UHMWPE...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005659
EISBN: 978-1-62708-198-6
... Abstract This article provides a summary of the biocompatibility or biological response of metals, ceramics, and polymers used in medical implants, along with their clinical issues. The polymers include ultrahigh-molecular-weight polyethylene, nonresorbable polymer, and resorbable polymers...
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Published: 15 May 2022
, polyethylene; PEEK, polyetheretherketone; PMMA, polymethyl methacrylate; PTFE, polytetrafluoroethylene; UHMWPE, ultrahigh-molecular-weight polyethylene.
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in Additively Manufactured Biomedical Energy Harvesters
> Additive Manufacturing in Biomedical Applications
Published: 12 September 2022
Fig. 1 Electrical properties of triboelectric materials. Materials near the positive direction release electrons, and those near the negative direction gain electrons. EVA, ethylene-vinyl acetate; LDPE, low-density polyethylene; HDPE, high-density polyethylene; UHMWPE, ultrahigh-molecular
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Published: 01 June 2012
Fig. 15 Schematic diagram of artificial hip joint. UHMWPE, ultrahigh-molecular-weight polyethylene
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Published: 12 September 2022
, polyetherketone; PEEK, polyetheretherketone; UHMWPE, ultrahigh-molecular-weight polyethylene; PE, polyethylene; PET, polyethylene terephthalate; PA, polyamide. T m , melting temperature; T f , fictive temperature, T g , glass transition temperature
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Published: 15 May 2022
properties of the polymer and the surface topography of the counterface. PE, polyethylene; PTFE, polytetrafluoroethylene; UHMWPE, ultrahigh-molecular-weight polyethylene. Reprinted with permission from Ref 1
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Published: 01 January 2000
Fig. 15 Fatigue plot illustrating the devastating effect of gamma radiation sterilization on the fatigue resistance of orthopedic grade ultrahigh molecular weight polyethylene used for total joint replacements
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Published: 01 June 2012
Fig. 20 Friction coefficients of a calcium phosphate coating (deposited on a steel substrate) when sliding against an ultrahigh-molecular-weight polyethylene pin at various sliding speeds and in both dry and lubricated conditions
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Published: 01 June 2012
Fig. 13 Wear behavior of various femoral head/cup combinations. Even higher ultrahigh-molecular-weight polyethylene (UHMWPE) wear rates are encountered with titanium-base femoral heads. Source: Ref 8
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in Biomedical Coatings Made by Thermal Spraying for Orthopaedic Joint Applications
> Thermal Spray Technology
Published: 01 August 2013
Fig. 1 Artificial hip joint on which titanium (Ti) and hydroxyapatite (HA) coatings were applied by plasma spraying for promotion of bone growth. UHMWPE, ultrahigh-molecular-weight polyethylene. Courtesy of Stryker Howmedica Osteonics
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Published: 31 December 2017
Fig. 11 Overview of typical wear particle sizes versus wear rates reported for various acetabular liners used in total hip replacement (THR). Data is presented based on (a) the volumetric wear rate and (b) wear particle generation rate. PCU, polycarbonate-urethane; UHMWPE, ultrahigh molecular
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Published: 01 June 2012
Fig. 1 Implant debris from two types of materials. The metal (cobalt alloy) is more rounded versus the polymeric (ultrahigh-molecular-weight polyethylene, or UHMWPE) debris, which is more elongated in shape. Metal debris can be produced at modular connections of implants, at articulating
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Published: 31 December 2017
Fig. 8 Examples of pneumatic seals shown on the left and their housings on the right. (a) Single-acting, polyurethane rod seal with U-shaped cross section. (b) Double-acting rod seal, comprising an ultrahigh-molecular-weight-polyethylene (UHMWPE) slipper seal and an energizing acrylonitrile
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Published: 01 June 2012
Fig. 11 Typical components found in an unassembled total hip replacement (THR) implant. It should be noted that this is one of many artificial joint designs used in THR arthroplasty. For example, implants secured by bone cements would not be porous coated. Similarly, the ultrahigh-molecular
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Published: 15 May 2022
Fig. 26 SEM fractographs of fatigue fracture surface of ultrahigh-molecular-weight polyethylene, using compact-tension specimens in the Paris regime. Direction of crack growth indicated by the white arrows. (a) Sterilized specimen tested at ambient temperatures. Original magnification: 1000
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