The formation and thermal stability of amorphous Ni-Nb alloy powder synthesized by mechanical alloying

1987 ◽  
Vol 94 (1) ◽  
pp. 88-100 ◽  
Author(s):  
P.Y. Lee ◽  
C.C. Koch
Keyword(s):  
Thermal Stability ◽  
Mechanical Alloying ◽  
Alloy Powder ◽  
Thermal Stability Of

scholarly journals New Method of Fabrication of Fe80Cr20 Alloy: Effect of its Technique on Crystallite Size and Thermal Stability

2020 ◽  
Vol 1 (1) ◽  
pp. 26-31
Author(s):  
Dafit Feriyanto ◽  
Supaat Zakaria
Keyword(s):  
Thermal Stability ◽  
Mechanical Alloying ◽  
Crystallite Size ◽  
Combination Treatment ◽  
Alloy Powder ◽  
Xrd Analysis ◽  
New Method ◽  
Ultrasonic Technique ◽  
Mechanically Alloyed ◽  
Thermal Stability Of

This paper focuses on the effect of the new method on the crystallite size and thermal stability of Fe80Cr20 alloy powder. Generally, the ball milling sample and ultrasonic technique sample have dissatisfaction result when applied at high temperature. In addition, the combination of both techniques not yet carried out. Therefore, this study aim to investigate an appropriate technique to produce smallest crystallite size in order to improve the thermal stability. The new method of mechanical alloying (mill) and ultrasonic technique (UT) were applied in order to reduce the crystallite size and improve thermal stability. 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 by 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 0C temperature operation. The combination treatment is method which is effective to fabricate Fe80Cr20 alloy powder.

Structure and thermal stability of biodegradable Mg–Zn–Ca based amorphous alloys synthesized by mechanical alloying

2011 ◽  
Vol 176 (20) ◽  
pp. 1637-1643 ◽  
Author(s):  
Moni Kanchan Datta ◽  
Da-Tren Chou ◽  
Daeho Hong ◽  
Partha Saha ◽  
Sung Jae Chung ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mechanical Alloying ◽  
Amorphous Alloys ◽  
Thermal Stability Of

Thermal Stability of Amorphous Ti- Cu- Ni- Sn Prepared by Mechanical Alloying

2007 ◽  
Vol 534-536 ◽  
pp. 233-236 ◽  
Author(s):  
N.T.H. Oanh ◽  
Pyuck Pa Choi ◽  
Ji Soon Kim ◽  
Dae Hwan Kwon ◽  
Young Soon Kwon
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Mechanical Alloying ◽  
Amorphous Alloys ◽  
High Energy ◽  
Scanning Calorimetry ◽  
Thermal Stability Of

Ti-Cu-Ni-Sn quaternary amorphous alloys of Ti50Cu32Ni15Sn3, Ti50Cu25Ni20Sn5, and Ti50Cu23Ni20Sn7 composition were prepared by mechanical alloying in a planetary high-energy ballmill (AGO-2). The amorphization of all three alloys was found to set in after milling at 300rpm speed for 2h. A complete amorphization was observed for Ti50Cu32Ni15Sn3 and Ti50Cu25Ni20Sn5 after 30h and 20h of milling, respectively. Differential scanning calorimetry analyses revealed that the thermal stability increased in the order of Ti50Cu32Ni15Sn3, Ti50Cu25Ni20Sn5, and Ti50Cu23Ni20Sn7.

Thermal stability of amorphous Mg50Ni50 alloy produced by mechanical alloying

2010 ◽  
Vol 356 (2) ◽  
pp. 120-123 ◽  
Author(s):  
D. Guzmán ◽  
S. Ordoñez ◽  
D. Serafini ◽  
P.A. Rojas ◽  
C. Aguilar ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mechanical Alloying ◽  
Thermal Stability Of
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