Microstructure and Tribological Behavior of Ti2AlN MAX Phase Synthesized through Mechanical Activation–Spark Plasma Sintering Method

2022 ◽  
Author(s):  
E. Gholami nejad ◽  
M. Farvizi ◽  
A. Habibolahzadeh
Keyword(s):  
Mechanical Activation ◽  
Spark Plasma Sintering ◽  
Tribological Behavior ◽  
Max Phase ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method

scholarly journals Study of the Influence of Sintering Atmosphere and Mechanical Activation on the Synthesis of Bulk Ti2AlN MAX Phase Obtained by Spark Plasma Sintering

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4574
Author(s):  
Christopher Salvo ◽  
Ernesto Chicardi ◽  
Cristina García-Garrido ◽  
Rosalía Poyato ◽  
José A. Jiménez ◽  
...  
Keyword(s):  
Mechanical Activation ◽  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Max Phase ◽  
Activation Process ◽  
X Ray Diffraction ◽  
Sintering Atmosphere ◽  
X Ray ◽  
Plasma Sintering ◽  
Spark Plasma

The influence of the mechanical activation process and sintering atmosphere on the microstructure and mechanical properties of bulk Ti2AlN has been investigated. The mixture of Ti and AlN powders was prepared in a 1:2 molar ratio, and a part of this powder mixture was subjected to a mechanical activation process under an argon atmosphere for 10 h using agate jars and balls as milling media. Then, the sintering and production of the Ti2AlN MAX phase were carried out by Spark Plasma Sintering under 30 MPa with vacuum or nitrogen atmospheres and at 1200 °C for 10 min. The crystal structure and microstructure of consolidated samples were characterized by X-Ray Diffraction, Scanning Electron Microscopy, and Energy Dispersive X-Ray Spectroscopy. The X-ray diffraction patterns were fitted using the Rietveld refinement for phase quantification and determined their most critical microstructural parameters. It was determined that by using nitrogen as a sintering atmosphere, Ti4AlN3 MAX phase and TiN were increased at the expense of the Ti2AlN. In the samples prepared from the activated powders, secondary phases like Ti5Si3 and Al2O3 were formed. However, the higher densification level presented in the sample produced by using both nitrogen atmosphere and MAP powder mixture is remarkable. Moreover, the high-purity Ti2AlN zone of the MAX-1200 presented a hardness of 4.3 GPa, and the rest of the samples exhibited slightly smaller hardness values (4.1, 4.0, and 4.2 GPa, respectively) which are matched with the higher porosity observed on the SEM images.

scholarly journals Microstructure and properties of nano-laminated Y3Si2C2 ceramics fabricated via in situ reaction by spark plasma sintering

2021 ◽  
Vol 10 (3) ◽  
pp. 578-586
Author(s):  
Lin-Kun Shi ◽  
Xiaobing Zhou ◽  
Jian-Qing Dai ◽  
Ke Chen ◽  
Zhengren Huang ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Atomic Scale ◽  
Max Phase ◽  
X Ray Diffraction ◽  
Selected Area Electron Diffraction ◽  
Plasma Sintering ◽  
Transmission Electron ◽  
Spark Plasma ◽  
Diffraction Patterns

AbstractA nano-laminated Y3Si2C2 ceramic material was successfully synthesized via an in situ reaction between YH2 and SiC using spark plasma sintering technology. A MAX phase-like ternary layered structure of Y3Si2C2 was observed at the atomic-scale by high resolution transmission electron microscopy. The lattice parameters calculated from both X-ray diffraction and selected area electron diffraction patterns are in good agreement with the reported theoretical results. The nano-laminated fracture of kink boundaries, delamination, and slipping were observed at the tip of the Vickers indents. The elastic modulus and Vickers hardness of Y3Si2C2 ceramics (with 5.5 wt% Y2O3) sintered at 1500 °C were 156 and 6.4 GPa, respectively. The corresponding values of thermal and electrical conductivity were 13.7 W·m-1·K-1 and 6.3×105 S·m-1, respectively.

Microstructure investigation of V2AlC MAX phase synthesized through spark plasma sintering using two various sources V and V2O5 as the starting materials

2019 ◽  
Vol 45 (18) ◽  
pp. 23902-23916 ◽  
Author(s):  
Mohsen Hossein-Zadeh ◽  
Omid Mirzaee ◽  
Hamidreza Mohammadian-Semnani ◽  
Mansour Razavi
Keyword(s):  
Spark Plasma Sintering ◽  
Max Phase ◽  
Plasma Sintering ◽  
Spark Plasma

Preparation of MoSi2-SiB6 oxidation inhibition coating on graphite by spark plasma sintering method

2021 ◽  
Vol 405 ◽  
pp. 126511
Author(s):  
Weisheng Liu ◽  
Xuanru Ren ◽  
Hongao Chu ◽  
Menglin Zhang ◽  
Qingqing Yang ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method
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