• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Society for Ceramics in Medicine. >Comparison between the SBF Response of Hydroxyapatite Coatings Deposited Using Both a Plasma-Spray and A Novel Co-Incident Micro-Blasting Technique
【24h】

Comparison between the SBF Response of Hydroxyapatite Coatings Deposited Using Both a Plasma-Spray and A Novel Co-Incident Micro-Blasting Technique

机译：使用等离子喷涂和新型共入微爆发技术沉积羟基磷灰石涂层SBF响应的比较

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper reports on the response of hydroxyapatite (HA) coatings, fabricated using two deposition technologies, to immersion in simulated body fluid (SBF). The deposition methods used were: plasma spray, a commercial standard, and CoBlast, a novel low temperature microblast technique. In the case of the latter, HA coatings are deposited by simultaneous blasting HA and abrasive powders concentrically at a metallic substrate, resulting in a thin layer of HA (approx. 2.5 μm thick). Groups of the CoBlast and plasma spray HA coatings were immersed in 7 ml of SBF solution for 1, 2, 4, 7, 14 and 28 days, and were subsequently removed and examined for any alterations caused by the SBF solution. It was noted from this study that the CoBlast HA coatings appeared to undergo a two step calcium phosphate recrystallisation process; initial homogenous nucleation and subsequent heterogeneous nucleation. Conversely recrystallisation on the plasma spray coatings appeared to proceed largely through a heterogeneous nucleation process. Two factors that may influence the differences in HA recrystallisation is the presence of amorphous HA resulting in rapid dissolution, and/or the significantly lower surface area (roughness) offered to the SBF solution by the CoBlast coatings. The interpretation of recrystallisation mechanisms from this preliminary study is limited however by the differences in coating morphology and thickness (27 versus 2 μm) for the plasma spray and CoBlast HA coatings respectively.
机译：本文报道了使用两种沉积技术制造的羟基磷灰石（HA）涂层的响应，以浸入模拟体液（SBF）中。所用的沉积方法是：等离子体喷雾，商业标准和Coblast，一种新型低温微腮腺技术。在后者的情况下，通过同时在金属基材上同时爆破HA和磨料粉末沉积HA涂层，得到薄的HA（约2.5μm厚）。将Coblast和等离子体喷雾HA涂层的基团浸入7ml的SBF溶液中1,2,4,7,14和28天，随后除去并检查由SBF溶液引起的任何改变。从该研究中注意到，Coblast HA涂层似乎经历了两步磷酸钙再结晶过程;最初的均匀成核和随后的异质成核。相反，在等离子体喷涂涂层上的重结晶似乎在很大程度上通过异质成核过程进行。可能影响HA重结晶差异的两个因素是存在无定形HA，导致通过Coblast涂料提供给SBF溶液的快速溶解，和/或显着降低的表面积（粗糙度）。然而，从该初步研究的重结晶机制的解释是有限的，然而通过分别涂覆形态和厚度（27与2μm）的差异分别用于等离子体喷雾和Coblast HA涂层。

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