JASON B LANGHORN,RONALD W OVERHOLSER,BRYAN J SMITH
申请号：
IN3285/DEL/2011
公开号：
IN2011DE03285A
申请日:
2011.11.18
申请国别(地区):
IN
年份:
2013
代理人:
摘要：
Orthopaedic implants with scratch-, wear- and corrosion-resistant ceramic coatings on metal substrates are provided, as well as methods for making such coatings. The metal substrate is advantageously HIPd and homogenized prior to coating with the ceramic, and the HIPd and homogenized metal substrate is preferably ground and polished prior to coating with the ceramic. The ceramic coating may include a band with multiple thin alternating layers of titanium nitride, titanium carbonitride or both titanium nitride and titanium carbonitride, and may include an alumina overcoat. The present coatings curtail the growth of microcracks that can otherwise result from surface cracks or scratches on coated substrates, and thereby provide improved wear characteristics, scratch resistance, and prevent the penetration of corrosive fluids to the substrate material.
