|About this Abstract
||Materials Science & Technology 2011
||Emerging Frontiers in Surface Engineering of Biomaterials
||Surface Engineering of Biomaterials by Colossal Supersaturation with Interstitial Solutes
||Frank Ernst, Gary M. Michal, Arthur H. Heuer
|On-Site Speaker (Planned)
A great potential for engineering of biocompatible surfaces is provided by colossal suporsaturation with interstitial solutes, infused from the surface. For austenitic stainless steel and related structural alloys, this can be realized by gas-phase carburization at low temperature, a method developed by the Swagelok Company. This treatment produces a precipitate-free "case" (hard shell) with a depth of order 25 Ám, providing much improved mechanical and tribological properties (hardness, wear-, and fatigue resistance) as well as significantly increased corrosion resistance under conditions typical for applications in biological systems. After describing the physical principles, we will present examples of biomaterials treated with this method, demonstrate significant improvements in mechanical properties and corrosion resistance, and discuss the resulting possibilities and limitations for extending the lifetime of structural alloys in biomedical applications.
||Definite: A CD-only volume