【摘 要】
：
The oxidation behavior of TiAl-Cr(mole fraction of Cr-0-20%) was investigated at 1 173 K in air. The microstructure and composition of the oxide scale were stud
【机 构】
：
School of Materials Science and Engineering
论文部分内容阅读
The oxidation behavior of TiAl-Cr(mole fraction of Cr-0-20%) was investigated at 1 173 K in air. The microstructure and composition of the oxide scale were studied by X-ray diffractometry(XRD), scanning electron microscopy(SEM) and electro-probe micro-analyses(EPMA). The results show that with the addition of Cr content from 0 to 8%, the oxidation resistance decreases, especially at 3%, which is mainly attributed to the doping effect of Cr3+. TiAl-Cr(mole fraction of Cr-15%-20%) has good oxidation resistance, and the protective alumina layer is preferentially formed on the surface of TiAl alloy, which is due to an increase of mole ratio of Al to Ti in TiAl-Cr alloys.
其他文献
A continuous wave carbon dioxide (CO2) laser (λ=10.6μm) was employed to treat the surface of Si3N4 MOR (modulus of rupture) bars. The effects of the CO2 laser
Long-lasting phosphor Y2O2S∶Eu3+, Mg2+, Ti4+ was synthesized by a flux method and their luminescence properties were investigated. The result indicates that th
A kind of sulphide, CaS:Eu2+, activated by europium ion for white LED lighting was synthesized via solid-state reaction route in reducing atmospheres. The phosp
Polyaniline/Attapugite/ PE(PAn-ATTP/PE)composites containing particles with core-shell structure were obtained via the two-step blending processs. The experimen
The magnetic and magnetocaloric properties for the Nd12Co6Pb compound were investigated. The Curie temperature TC of the magnetic transition of Nd12Co6Pb compou
The catalysts with Rh loading on different cerium-zirconium mixed oxides were characterized by BET, H2-TPR and OSC. The effects of different cerium-zirconium mi
The effect of phosphorus on the oxidation resistance of low thermal expansion alloy IN909 was studied. The composition and structure of the oxidation layer were
With coaxial nozzle system,TiO2 hollow spheres were prepared and the optimum parameters of forming TiO2 hollow spheres were fix on as follows: acrylamide (AM) w
Electroplating zinc coating as transition layer of electroless nickel plating on AM60 magnesium alloys was investigated. The zinc film can be deposited in a pyr
Al-5.6Zn-3.0Mg-1.6Cu-1.1Li-0.24Cr alloys and Al-8.0Zn-2.4Mg-2.4Cu-1.1Li-0.18Zr alloys (mass fraction, %) were aged by different processes. The microstructure an