Mechanical alloying of Si and Ge in a planetary ball mill: Milling parameters and microscopic evolution of alloy formation

1994 ◽  
Author(s):  
J. Schilz ◽  
K. Pixius ◽  
W. Amend ◽  
M. Plate ◽  
H.-J. Meyer
Keyword(s):  
Mechanical Alloying ◽  
Ball Mill ◽  
Planetary Ball Mill ◽  
Alloy Formation ◽  
Milling Parameters

Influence of Ball Milling Parameters on Preparation of Ti50Cu23Ni20Sn7 Amorphous Alloys Powder

2011 ◽  
Vol 55-57 ◽  
pp. 819-824
Author(s):  
Ge Wang ◽  
Qiang Li ◽  
Ying Gao ◽  
Jing Na Gao ◽  
Yu Ying Zhu ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Ball Milling ◽  
Amorphous Alloys ◽  
Ball Mill ◽  
Milling Time ◽  
Rotational Velocity ◽  
Weight Ratio ◽  
High Energy ◽  
Planetary Ball Mill ◽  
Milling Parameters

Ti50Cu23Ni20Sn7 amorphous alloys powder was prepared by mechanical alloying (MA) in a high-energy planetary ball mill. Milling parameters such as rotational velocity of ball mill, ball to powder weight ratio as well as milling time were throughly investigated. Mechanism of mechanical alloying was throughly discussed.

scholarly journals Effect of Milling Parameters on the Development of a Nanostructured FCC–TiNb15Mn Alloy via High-Energy Ball Milling

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1225
Author(s):  
Cristina García-Garrido ◽  
Ranier Sepúlveda Sepúlveda Ferrer ◽  
Christopher Salvo ◽  
Lucía García-Domínguez ◽  
Luis Pérez-Pozo ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Ball Mill ◽  
Milling Time ◽  
High Energy ◽  
Planetary Mill ◽  
Nominal Composition ◽  
Mechanically Alloyed ◽  
Milling Parameters ◽  
Energy Ball ◽  
Full Conversion

In this work, a blend of Ti, Nb, and Mn powders, with a nominal composition of 15 wt.% of Mn, and balanced Ti and Nb wt.%, was selected to be mechanically alloyed by the following two alternative high-energy milling devices: a vibratory 8000D mixer/mill® and a PM400 Retsch® planetary ball mill. Two ball-to-powder ratio (BPR) conditions (10:1 and 20:1) were applied, to study the evolution of the synthesized phases under each of the two mechanical alloying conditions. The main findings observed include the following: (1) the sequence conversion evolved from raw elements to a transitory bcc-TiNbMn alloy, and subsequently to an fcc-TiNb15Mn alloy, independent of the milling conditions; (2) the total full conversion to the fcc-TiNb15Mn alloy was only reached by the planetary mill at a minimum of 12 h of milling time, for either of the BPR employed; (3) the planetary mill produced a non-negligible Fe contamination from the milling media, when the highest BPR and milling time were applied; and (4) the final fcc-TiNb15Mn alloy synthesized presents a nanocrystalline nature and a partial degree of amorphization.

scholarly journals Pengaruh Penambahan Doping Mn/Cu pada Barium Heksaferit sebagai Material Penyerap Gelombang

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Silviana Simbolon ◽  
Anggito P Tetuko ◽  
Candra Kurniawan ◽  
Perdamean Sebayang ◽  
Krista Sebayang
Keyword(s):  
Mechanical Alloying ◽  
Ball Mill ◽  
Planetary Ball Mill

Pada penelitian ini, telah dilakukan analisa efek doping Mn2+/Cu2+ sebanyak 0.1%mol terhadap struktur barium heksaferit sebagai material absorbsi gelombang mikro. Sintesis material dilakukan dengan metode mechanical alloying menggunakan planetary ball mill. Powder yang telah di-milling dikalsinasi pada temperature 1000 °C selama 2 jam. Powder hasil kalsinasi di kompaksi dengan tekanan 1.5 kgf/cm2 membentuk pellet dan di sinter pada temperatur 1150 °C selama 2 jam. Dari hasil eksperimen, menunjukkan penambahan ion Mn2+/Cu2+0.1 %mol mengakibatkan nilai densitas bulk meningkat jika dibandingkan dengan  barium heksaferit. Efek penambahan ion Mn2+/Cu2+ menurunkan nilai koersivitas (Hjc) dan menaikkan nilai remanensi (Mr) yaitu BaFe12O19 memiliki Hjc = 6.45 KOe dan Mr = 0.91 KG, BaFe11.9Mn0.1O19 memiliki Hjc = 3.27 KOe dan Mr = 1.62 KG sedangkan BaFe11.9Cu0.1O19 memiliki Hjc = 1.75 KOe dan Mr = 1.79 KG. Pengukuran refflection loss gelombang mikro menggunkan VNA menunjukkan bahwa penambahan ion Mn2+/Cu2+ pada barium heksaferit memiliki rentang frekuensi yang berbeda. Frekuensi BaFe11.9Mn0.1O19 sekitar 4 – 10 GHz dan BaFe11.9Cu0.1O19 sekitar 4 – 8 GHz. Hal ini menunjukkan bahwa besar penyerapan gelombang yang cukup signifikan dengan adanya penambahan doping Mn/Cu 0.1 %mol jika dibandingkan terhadap barium hexaferit.

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