A feasibility study of bonding of powder silicides for application to aero and land-based turbines.
Lead Research Organisation:
University of Sheffield
Department Name: Materials Science and Engineering
Abstract
The aim of this research programme is to assess a way of increasing the operating tremperature of aero and land-based turbine engines. It is planned to replace Ni single crystal blades with Nb silicides which have optimised high temperature properties. The inevitable lack of room temperature ductility in these materials will be overcome by investigating the feasibility of diffusion bonding a high Si-content Nb silicide (which will have good high temperature properties appropriate to a blade) to a high Nb-content Nb silicide which will have signficant ductility (appropriate for a blade root) but reduced high temperature strength. Powder-route material will be used so that consolidation and diffusion bonding will be carried out simultaneously which should allow good bonding and shape control during HIPping. A preliminary assessment will be made of the feasibility of using nanopowders in this work. Oxidation studies of the chosen compositions will be carried out.
Organisations
People |
ORCID iD |
| Panayiotis Tsakiropoulos (Principal Investigator) |
Publications
N Vellios
(2008)
On the microstructure of the Nb-30Ti-10Si-5Cr-5Sn-3Fe-2Al-2Hf alloy
in Intermetallics
N Vellios
(2008)
On the microstructure of the Nb-10Ti-21Si-5Al-5W-2Cr-2V-1Hf alloy,
in Intermetallics
Papadimitriou I
(2014)
Ab Initio Study of Binary and Ternary Nb3(X,Y) A15 Intermetallic Phases (X,Y = Al, Ge, Si, Sn)
in Metallurgical and Materials Transactions A
Papadimitriou I
(2015)
Ab initio investigation of the intermetallics in the Nb-Sn binary system
in Acta Materialia
Papadimitriou I
(2014)
Ab initio study of the intermetallics in Nb-Si binary system
in Intermetallics
Tsakiropoulos P
(2014)
On the macrosegregation of silicon in niobium silicide based alloys
in Intermetallics
Vellios N
(2010)
Study of the role of Fe and Sn additions in the microstructure of Nb-24Ti-18Si-5Cr silicide based alloys
in Intermetallics
Vellios N
(2010)
Study of the role of Fe and Sn additions in the microstructure of Nb-24Ti-18Si-5Cr silicide based alloys
in Intermetallics
Vellios N
(2007)
The role of Fe and Ti additions in the microstructure of Nb-18Si-5Sn silicide-based alloys
in Intermetallics
| Description | The research was focused on developmental Nb silicide based alloys. These alloys are candidate materials for ultra high temperature applications in aero gas turbines. The research on alloy development identified Sn as an alloying element that benefits significantly resistance to high temperature oxidation |
| Exploitation Route | Negotiations with Rolls Royce for taking assignment of the patents |
| Sectors | Aerospace, Defence and Marine,Energy |
| Description | Led to UK patent application and subsequently to an international patent application Partner in the EPSRC-Rolls Royce research partnership via grant EP/H500405/1 |
| First Year Of Impact | 2009 |
| Sector | Aerospace, Defence and Marine,Energy |
| Impact Types | Economic,Policy & public services |