The effect of crystallinity on the fracture of polytetrafluoroethylene (PTFE)

被引：90

作者：

Brown, Eric N.

Rae, Philip J.

Orler, E. Bruce

Gray, George T., III

Dattelbaum, Dana M.

机构：

[1] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, Dynam Experimentat Div, Los Alamos, NM 87545 USA

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2006年 / 26卷 / 08期

关键词：

polytetrafluoroethylene (PTFE); fracture; crystallinity; phase transformation;

D O I：

10.1016/j.msec.2005.08.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The extremely low coefficient of friction and biocompatibility provided by the inert nature of polytetrafluoroethylene (PTFE) have lead to its application in a wide range of biological implants ranging from single component PTFE structures to sliding contact pads in complex joints. In vivo fracture has been identified as a major cause of failure in these implants. It has recently been shown that the fracture behavior of PTFE undergoes transitions from brittle-fracture below 19 degrees C to ductile-fracture with fibril formation and large-scale plasticity over 30 degrees C associated with crystalline phase transformations. In this paper the formation of fibrils and an associated increase in J(IC) fracture toughness are revealed to be restricted by an increase in crystalline content in PTFE. [LAUR 05-2223] (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1338 / 1343

页数：6

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