Effect of Cr to Fe on the solid solubility, lattice parameter and strain fabrication of Fe80Cr20 alloy powder
This paper focuses on the effect of the new method on the crystallite size and thermal stability of FegoCr2a~li oy powder. Generally, the ball milling sample and ultrasonic technique sample have dissatisfaction result when applied at high temperature. In addition, the combination both of those techn...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/5882/ http://eprints.uthm.edu.my/5882/1/Effect_of_Cr_to_Fe_on_the_Solid_Solubility.pdf |
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| Summary: | This paper focuses on the effect of the new method on the crystallite size and thermal stability of FegoCr2a~li oy powder. Generally, the ball milling sample and ultrasonic technique sample have dissatisfaction result when applied at high temperature. In addition, the combination both of those techniques not yet carried out. The new method of mechanical
alloying and ultrasonic technique were applied in order to reduce the crystallite size. The new method is called as
combination treatment. This condition allows the enhancement of thermal stability of Fe80Cr20 alloy powder. In this study, mechanical alloying process was carried out with milling time of 60 hours. Then, the ultrasonic technique was
performed at frequency of 35 kHz at 3, 3.5, 4, 4.5, and 5 hours. From XRD analysis, it was found that the broader
peaks indicated the smaller crystallite size. It shows that the combination treatment (milled and UT) reduce the crystallite size up to 2.171 nm when mechanically alloyed for 60 hours (milled 60 h) and followed by ultrasonic treatment for 4.5 hours (UT 4.5 h). Smallest crystallite size enhance the thermal stability up to 12.7 mg which shown by TGA analysis during 1100 'C temperature operation. The
combination treatment is method which is effective to fabricate Fe80Cr20 alloy powder. |
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