Event date:
Feb 2 2024 2:00 pm

From bone scaffolds to tooling: Innovative approaches to fabricate functional materials and cost-effective tools

Dr. Abdullah Riaz Faculty of Mechanical Engineering and Marine Technology, University of Rostock, Germany
Dean’s Smart Lab, 4th floor SBASSE Building
Although Ti6Al4V scaffolds excel in biomechanical stability, their inherent lack of electrical activity hinder optimal tissue regeneration. In the first part of my talk, I will delve into our groundbreaking research utilizing field-assisted sintering to produce piezoelectric biocompatible ceramics that emulate the properties of natural bone. Through innovative methods, we integrate the biomechanical strength of Ti6Al4V with electrical functionalities, achieving a composite scaffold of Ti6Al4V-barium titanate via coupling electron beam melting and field-assisted sintering. Transitioning to the second part, I will discuss our advancements in Composite Extrusion Modeling for 3D printing applications. Here, we utilized injection molding feedstocks to produce metal and ceramic components, emphasizing the optimization of printing parameters for enhanced part density and reduced surface roughness. While this approach holds promise, it's crucial to address challenges such as sintered part quality under non-optimized conditions and the observed anisotropic shrinkage in additively manufactured components, a phenomenon influenced by the layer-by-layer extrusion methodology. In essence, this comprehensive talk will offer insights, furthering the expertise of our research group in the realms of multi-material manufacturing, functional material development, and advanced 3D printing techniques tailored for applications spanning tissue engineering to rapid tools production.

Abdullah Riaz studied Master of Science in Physics at University of Rostock with specialization in physics of nanomaterials and clusters. In his Master’s thesis he focused on the synthesis and characterization of bulk nanocrystalline Fe-Ni and amorphous Fe-Ni-Ta-B alloys for a potential applications as sensors and actuators in telecommunication and aeronautical industries.

Mr. Riaz worked as a research assistant in the group of Physics of New Materials at Institute of Physics, University of Rostock. He was involved in the development of 3D active implant prototype. During this time, he synthesized bulk nanostructured ceramics by conventional and Field Assisted Sintering Technique (FAST). He investigated ceramic materials and demonstrated that nanostructured bulk calcium titanate provides piezoelectric properties that resemble to the natural bone and allow faster integration of orthopedic implants into the bone. In January 2020 he received his PhD degree in experimental physics.

Since March 2020, Abdullah Riaz is a research scientist at the chair of microfluidics, University of Rostock. He is leading the research activities focused on sintering technology, the FAST sintering process. Dr. Riaz is also responsible for the development of a rapid tooling process to produce tools for the metal injection molding process by using an additive manufacturing process. He is also an associate scientist of the SFB ELAINE – Electrically Active Implants, which is a DFG collaborative research center that focuses on novel electrically active implants.