Advanced CerMet ceramic composites for medical applications

Area of Science:

• Materials Science
• Biomedical Engineering
• Ceramic Engineering

Background:

• Implantable active devices require materials with exceptional biocompatibility and reliability for long-term in-vivo use.
• Existing materials often face challenges integrating conductors within insulating matrices due to thermal expansion mismatches.
• There is a need for advanced materials that meet the stringent demands of modern medical implants.

Purpose of the Study:

• To develop a novel dual composite material for active, implantable medical devices.
• To achieve a complex profile of properties including biocompatibility, reliability, and specific functional characteristics.
• To overcome integration challenges between conductive and ceramic components.

Main Methods:

• Utilized a dual composite approach combining multilayer technology with a ceramic-metal (CerMet) mixture for the conductor.
• Embedded an electrical conductor within a ceramic matrix to create insulated conductive paths.
• Investigated microstructural, functional, and mechanical properties, including three-point bending tests.

Main Results:

• The CerMet composite demonstrated enhanced strength compared to pure ceramic.
• Achieved strong and hermetic integration of the conductor within the ceramic matrix, mitigating thermal expansion mismatch.
• Developed down-scaled conductive paths (150µm diameter and smaller) with high, metal-like conductivity.
• The composite exhibited biocompatibility, non-magnetic properties, and chemical inertness.

Conclusions:

• The developed dual composite material offers a promising solution for active, implantable medical devices.
• The CerMet approach successfully integrates electrical conductivity and mechanical robustness within a biocompatible matrix.
• This technology enables the fabrication of smaller, more reliable, and functional medical implants.