Materials Synthesis and Development

Group

Ceramics for medical applications

Topic

gelcasting4

Gelcast and pressureless sintered (1260 °C) Al2O3 femur joint component. The average grain size of the MgO-doped microstructures in the micrograph is 0.63 µm.

hochfeste al2o3 komplexe

Subcritical crack velocity of high-purity dense or porous gelcast sub-µm Al2O3 ceramics in water and in air compared with conventional grades. The data give evidence of an outstanding high reliability of the sub-µm bioceramics.

High-strength Al2O3 joint prostheses of complex shape

 

Defect-free processing associated with complex shaping enables new products

The benefits of the high wear resistance and of the bio-inert behavior of Al2O3 ceramics for the use as hip joint prostheses are well known, but risks in the strength characteristics have limited the use for mechanically highly loaded joints of smaller caliper size. New technologies overcome these limitations by a leap in important materials parameters and by new options for free shaping.


Advantages
 

  • Free shaping
  • Strength 600-800 MPa
  • Highly dense sub-µm microstructures with a hardness HV10 > 2000 guarantee high wear resistance
  • No additional aging in aqueous media compared with air
  • Extreme purity reduces aging compared with coarser conventional grades


Products and services offered
 

  • Development of high-purity dense or porous Al2O3-bioceramics with sub-µm/nano microstructures
  • Optional development on the basis of commercial raw materials or with new nanocorundum (pending IKTS patent application)
  • Upscaling investigations supporting the development of new products
  • Investigations of the medical / technical performance (e.g. in prosthetic applications)