Yttria Dispersion Strengthened Nickel-based Superalloy by Mechanical Alloying

被引：8
|
作者：
Mohan, Monika [1 ]
Subramanian, S. [1 ]
Angelo, P. C. [1 ]
机构：
[1] PSG Coll Technol, Dept Met Engn, Coimbatore 641004, Tamil Nadu, India
来源：
TRANSACTIONS OF THE INDIAN CERAMIC SOCIETY | 2011年 / 70卷 / 03期
关键词：
ODS Ni-based alloy; Mechanical alloying; SPS compaction; OXIDATION; BEHAVIOR; SYSTEM;
D O I：
10.1080/0371750X.2011.10600158
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Present work involves preparation of nano sized yttria dispersed nickel-based superalloy by mechanical alloying (MA) in a planetary ball mill and optimization of process parameters. Nanocrystalline (NC) yttria was synthesized using a simple and economical sol-gel route. Elemental powders of composition Ni-20Cr-3Fe-0.5Ti-0.3Al-0.6Y(2)O(3) wt% were mechanically alloyed at various milling times (5-40 h) in dry milling. Purity of the alloy and phase evolution was characterized by XRD. The alloying behaviour, particle size, particle shape and compositional analysis were done by SEM/EDAX. TEM of MA powders showed grain size in the micrometer range. The powders were consolidated by spark plasma sintering at temperatures from 1173-1373 K and microhardness measurements were also done. The sample sintered at 1173 K had the highest hardness; higher than that reported in the literature.
引用
收藏
页码：125 / 130
页数：6
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