Nickel-based superalloys, currently used in turbine blades of gas turbine engines, have reached a plateau in temperature capability. Increasing the operating temperature of jet engines increases their efficiency. A new material is needed that can withstand the increased temperatures required. Rolls Royce PLC is sponsoring research students at IMPaCT to investigate one such material that shows promise in being able to replace nickel-based superalloys – niobium silicides. They possess a high liquidus temperature of (1880°C) and a low density of (7g cm-3 compared to 9g cm-3 for nickel-based superalloys). There are however material properties that need improvement if these materials are to succeed. Room temperature ductility is low, medium to high temperature oxidation resistance is poor and the material is difficult to cast due to high temperature reactions with mould materials such as alumina and silica. Improvement in these areas will be the focus of this collaborative project between IMPaCT and Rolls Royce PLC, which involves seven PhD students in total.