...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Raman spectroscopic study of remelting and annealing-induced effects on microstructure and compressive deformation behavior of highly crosslinked UHMWPE for total hip arthroplasty
【24h】

Raman spectroscopic study of remelting and annealing-induced effects on microstructure and compressive deformation behavior of highly crosslinked UHMWPE for total hip arthroplasty

机译：拉曼光谱研究对高度交联uhmwpe对总髋关节置换术的微观结构和压缩变形行为的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Three-dimensional crystallographic morphologies were studied by means of confocal/polarized Raman spectroscopy as developed upon manufacturing in three different types of first and second generation highly crosslinked UHMWPE (HXLPE) acetabular liners. The impact of such microstructural characteristics on the deformation behavior of the liners was also evaluated and discussed from the viewpoint of molecular chain mobility. All the investigated liners showed similar microstructural transitions within the first 35 mu pm below their surfaces in terms of crystallinity, molecular orientation, and crystalline anisotropy. Interestingly, different postirradiation heat treatments (remelting or annealing in single step or in sequential steps) led to clear differences in the subsurface microstructure among the three liners. Remelted liner possessed both lower bulk crystallinity and degree of molecular orientation as compared to the annealed liners. Sequentially, irradiated/annealed liner showed the highest degree of crystallinity and orientation among the studied liners. The peculiar microstructure of this latter liner exhibited the highest restoring (shape-recovery) force against the applied uniaxial strain. Accordingly, the present study suggests that the sequential irradiation and annealing offers an efficient way to obtain microstructure quite suitable for attaining high creep resistance. However, all the investigated liners exhibited the significantly low values of surface anisotropy, which could be equally efficient in minimizing strain-softening-assisted wear phenomena. (C) 2014 Wiley Periodicals, Inc.
机译：通过共聚焦/偏振拉曼光谱研究了三维晶体形态，如在三种不同类型的第一和第二代高度交联的UHMWPE（HXLPE）髋臼衬里所开发的。从分子链迁移率的观点出发，还评估并讨论了这种微观结构特性对衬里变形行为的影响。所有研究的衬垫在其表面下在结晶度，分子取向和结晶各向异性方面显示出类似的微观结构过渡。有趣的是，不同的研磨热处理（单步或顺序步骤中的重熔或退火）导致三个衬里中的地下微观结构的差异。与退火的衬垫相比，重熔衬里具有较低堆积的结晶度和分子取向度。依次，照射/退火的衬里显示了所研究的衬里中的结晶度和取向度。该后衬里的特殊微结构表现出抵抗施加的单轴应变的最高恢复（形状恢复）力。因此，本研究表明，连续照射和退火提供了一种有效的方法来获得适合于获得高蠕变性的微观结构。然而，所有调查的衬里都表现出表面各向异性的显着低位，这在最小化应变软化辅助磨损现象中可能同样有效。 （c）2014 Wiley期刊，Inc。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号