Development of Innovative Light Refractory Materials Using Beryllide for Gas Turbine

摘要

Beryllides have unique properties and potential possibilities of the application for light refractory material. The specific weight of some beryllide is less than 3 and the melting temperature is over 1500℃. With these excellent properties, it is expected to apply this material for Gas Turbine to enable the improvement of power generation efficiency and the reduction of CO_2 gas emission by increasing the operating temperature. It is also expected to apply this material for the engine parts of the automobile to improve the CO_2 gas emission and the power response. The objective of this study is to evaluate the feasibility of Be_(12)Ti based material for gas turbine application by the manufacturing technology development and the characterizations. As to the manufacturing technology development, some possible approaches of titanium beryllide ingots casting was implemented. Ingots dimension was cylindrical with 60 mm diameter and 60 mm height. The production of similar size billets was implemented using hot isostatic pressing. Ingots dimensions were cylindrical with 80 mm diameter and 80 mm height with HIP. As to the characterization, mechanical properties were evaluated for some samples that were preliminary fabricated with several compositions including Be_(12)Ti. The compatibility with structural material and the oxidation in air were also evaluated in this study. Some progress on this project is reported on this paper.