AlSb intermetallic semiconductor compound formation by solid state reaction after partial amorphization induced by mechanical alloying

2018 ◽  
Vol 93 ◽  
pp. 371-376 ◽  
Author(s):  
Florin Popa ◽  
Ionel Chicinas ◽  
Olivier Isnard
Keyword(s):  
Solid State ◽  
Mechanical Alloying ◽  
Solid State Reaction ◽  
Compound Formation ◽  
Semiconductor Compound

Progress of solid-state reaction during mechanical alloying of Zr-Al-Cu-Ni bulk metallic glass-forming alloys

1997 ◽  
Vol 226-228 ◽  
pp. 383-387 ◽  
Author(s):  
M. Seidel ◽  
M. Reibold ◽  
I. Bächer ◽  
H.-D. Bauer ◽  
J. Eckert ◽  
...  
Keyword(s):  
Solid State ◽  
Metallic Glass ◽  
Mechanical Alloying ◽  
Bulk Metallic Glass ◽  
Solid State Reaction ◽  
Glass Forming

THEORETICAL CALCULATION OF ATOMIC STRAIN ON MECHANICAL ALLOYED METASTABLE INTERMETALLIC

2009 ◽  
Vol 16 (01) ◽  
pp. 157-160
Author(s):  
L. PANG ◽  
J. XU ◽  
J. ZHANG
Keyword(s):  
Solid Solution ◽  
Solid State ◽  
Binary System ◽  
Mechanical Alloying ◽  
Theoretical Calculation ◽  
Solid State Reaction ◽  
Lattice Strain ◽  
Electron Theory ◽  
Strain Behavior ◽  
Good Coincidence

Mechanical alloying (MA) has been utilized to synthesize many equilibrium and/or nonequilibrium phases. During the MA process, alloys are formed by the solid-state reaction. Solid solution has been obtained by MA, strain occurs due to the dissolution one component in the binary system. An understanding of the strain in mechanical alloyed Ti – Al , Fe – Al , Ni – Al from the electronic level has remained elusive. In this communication, atomic strain behavior of Ti – Al , Fe – Al , Ni – Al systems is analyzed on the basis of the TFDC (abbreviation of the name of Thomas, Fermi, Dirac, and Cheng) electron theory. Lattice strain of Ti , Fe , Ni , and Al are compared with available experimental results. A very good coincidence was found.

Mechanical solid state reaction for synthesis of β–SiC powders

1995 ◽  
Vol 10 (3) ◽  
pp. 659-667 ◽  
Author(s):  
M. Sherif El-Eskandarany ◽  
Kenji Sumiyama ◽  
Kenji Suzuki
Keyword(s):  
Solid State ◽  
Mechanical Alloying ◽  
Solid State Reaction ◽  
Gas Flow ◽  
Elevated Temperatures ◽  
High Energy ◽  
Lattice Parameter ◽  
Morphological Properties ◽  
Phonon Modes ◽  
Uniform Size

Stoichiometric β-SiC powders have been successfully prepared by solid state reaction of elemental silicon and carbon powders via the mechanical alloying process. The mechanical alloying process was performed in a high-energy ball mill under argon gas flow at room temperature. The solid-state reacted alloy powders have been characterized as a function of the milling time by means of x-ray diffraction, infrared absorption, scanning and transmission electron microscopy, and chemical analysis. Complete fcc-SiC (β-phase) alloy powders were obtained after 1080 ks of continuous milling. The lattice parameter (a0) of the formed β-SiC was calculated to be 0.4357 nm. No free silicon and/or carbon crystals were observed. The existence of transverse optical (TO) and longitudinal optical (LO)-like phonon modes is observed for the end-product alloy powders. Mechanically alloyed β-SiC powders are stable at elevated temperatures (1773 K) and did not transform to any other phases. The end-product β-SiC alloy powders possess excellent morphological properties, such as homogeneous shape (spherical morphology) with fine and smooth surface relief and uniform size (less than 0.5 μm in diameter). The fabricated β-SiC alloy powders have fine cell-like structure with nanoscale dimensions of about 7 nm.

Thermoelectric Properties of Solid-State Synthesized Magnesium Silicides Doped with Group BI-III Elements

2012 ◽  
Vol 724 ◽  
pp. 385-388 ◽  
Author(s):  
Sin Wook You ◽  
Soon Mok Choi ◽  
Won Seon Seo ◽  
Sun Uk Kim ◽  
Kyung Wook Jang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Solid State ◽  
Mechanical Alloying ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Solid State Reaction ◽  
Figure Of Merit ◽  
Lattice Thermal Conductivity ◽  
Group B

Group BI(Cu, Ag)-, BII(Zn)- and BIII(Al, In)-doped Mg2Si compounds were synthesized by solid state reaction and mechanical alloying. Electronic transport properties (Hall coefficient, carrier concentration and mobility) and thermoelectric properties (Seebeck coefficient, electrical conductivity, power factor, thermal conductivity and figure of merit) were examined. Mg2Si powder was synthesized successfully by solid state reaction at 773 K for 6 h and doped by mechanical alloying for 24 h. It was fully consolidated by hot pressing at 1073 K for 1 h. The electrical conductivity increased by doping due to an increase in the carrier concentration. However, the thermal conductivity did not changed significantly by doping, which was due to much larger contribution of the lattice thermal conductivity over the electronic thermal conductivity. Group BIII(Al, In) elements were more effective to enhance the thermoelectric properties of Mg2Si.

Phase Transformation and Synthesis of Ni Substituted CoSb3 Skutterudite Synthesis during Solid State Reaction

2005 ◽  
Vol 475-479 ◽  
pp. 857-860 ◽  
Author(s):  
Jun You Yang ◽  
Yuehua Chen ◽  
Jiangying Peng ◽  
Wen Zhu ◽  
Xin Li Song
Keyword(s):  
Phase Transformation ◽  
Solid State ◽  
Mechanical Alloying ◽  
Solid State Reaction ◽  
Ball Mill ◽  
Single Phase ◽  
Lattice Parameter ◽  
Maximum Solubility ◽  
Mechanically Alloyed ◽  
Skutterudite Compound

Starting from elemental Co (99.9%), Ni (99.9%) and Sb (99.99%) powders, Co4-xNixSb12 powder mixture with different Ni concentration were subjected to mechanical alloying by using a planetary ball mill. Phase transformation during mechanical alloying process of Co-Ni-Sb system was studied in this paper. Ni substituted skutterudite could be synthesized by solid state reaction. With assistance of hot pressing for two hours, the as mechanically alloyed low Ni concentration powders could be completely transformed into skutterudite compound. The lattice parameter of Ni substituted skutterudite compound complies well with Vegard law when x is not more than 0.2. When Ni concentration is larger than the maximum solubility, NiSb2 compound forms and single phase skutterudite compound can not be obtained.

Sign in / Sign up

Export Citation Format

Share Document