PROBLEM TO BE SOLVED: To provide a material which is excellent in high-temperature strength and room-temperature toughness, in which precision casting and directional solidification can be applied, and which is easily hot worked.MIURA SEIJI三浦 誠司MORI TETSUO毛利 哲夫...
能大幅度提高合金断裂韧性 材料科学与工程前沿 航空航天高温结构材料 High-Temperature Structural Materials in Aerospace 北京航空航天大学 材料学院 2018 年 4 月,沙江波 七、Nb-Si基高温合金 T/W ratio 20 Wrought superalloy Cast superalloy DS- superalloy Single-cystal superalloy 1320℃ 650 850 1050 1250...
properties of Nb–Si based alloys were dependent on the volume fraction [20–22], size and aspect ratio of Nbss [6,12,23], the num- ber of Nbss/Nb 5 Si 3 interfaces [6], and the morphology of Nb 5 Si 3 [24,25]. The previous study [18] indicates that Nb–Si based alloy cou...
The plastic deformation was not observed, which was common for brittle Nb–Si based alloys. Whereas, the fracture toughness did not exhibit the same tendencies with the UTS. As displayed in Fig. 3 (c), the toughness of the 0.20B alloy was slightly higher than that of the 0.05B alloy, ...
The structural and electrical properties of a Nb-Si thin alloy film as a function of temperature have been studied by Auger electron spectrometry, Rutherford backscattering spectroscopy, transmission electron microscopies, andin situelectrical resistivity and Hall coefficient measurements. The NbSi2,8films...
Nb-Ti-Si based alloySilicide coatingBoronizingOxidationHot corrosionIn this work, the preparation, high temperature oxidation and hot corrosion behavior of multilayered composite coatings prepared on NbTiSi based alloy have been reported. By boronizing of the SiY co-deposition silicide coating, part ...
hot——pressedtitaniumsilicideandtitaniumsilicide—。basedalloysand composites[J].MetallurgicalandMaterialsTransactionsA, 1998,29A(6):1629—1641. MITRAR,RA()VVR.Elevated—temperatureoxidationbehav— ioroftitaniumsilicideandtitaniumsilicide—rbasedalloyandeom—— ...
These Ti-based master alloys, which are very efficient in promoting the nucleation in wrought Al alloys, are not effective in Al-Si alloys because the Ti-based nuclei react with the silicon of These titanium silicides have high δ with the the Al-Si alloy to Al lattice and form titanium ...
图 11 合金化元素 Si,Al 在不同全共晶合金组织中的分布 Fig.11 The distributions of alloying elements Si and Al within the full eutectic Cr-57.5Nb-10Si alloy (a), and the full eutectic Cr-45Nb-17.5Al alloy (b) 图 12 为不同 Laves 相合金的压缩强度与断裂韧性.总体而言,不同 Laves 相合金...
Two kinds of Si-B-Y co-deposition coatings on an Nb-Ti-Si based alloy were prepared by pack cementation method and their microstructure and oxidation behavior were investigated. Results indicated that the coating prepared with higher B content in the pack was comprised of a porous NbB2 outer ...