Investigation of Inert Refractory systems for Investment Cast TiAl Alloys
The investment casting process offers great freedom of design with the economic advantage of near net shape production and has been widely used to process TiAl. An investigation was undertaken to develop a refractory slurry suitable for use as a face coat in investment casting of titanium aluminide alloys,retaining chemical stability and smooth surface finish. Pure yttria (YY) and yttria zicornia (ZY) based slurry systems were investigated. After sintering, the chemical inertness of shells in contact with molten TiAl alloys were tested by simulating the casting process using a flash remelting test,in which samples shells were contacted with titanium alunimide alloys at given temperatures for varying durations and re-solidified. Investment castings were produced to further test face coat inertness. An yttia-zirconia slurry system was found to have a good chemical inertness similar to pure a yttria system, this was confirmed by measuring hardened layer thickness and changes of the wetting angle between the shell and alloy substrates as a function of interact time.
Investment casting mould interaction TiAl alloys
X. Cheng C. Yuan P. Withey N. R. Green
School of Metallurgy and materials, The University of Birmingham ,United Kingdom Rolls-Royce pic. United Kingdom School of Metallurgy and materials, The University of Birmingham ,United Kingdom EPSRC Centre for In
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1363-1367
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）