scholarly journals Development and Characterization of Spark Plasma Sintered Novel Ni, Cu, WC Containing Nb-Based Alloys for High-Temperature Applications

2022 ◽  
Author(s):  
Yara Daniel Ribeiro ◽  
Alexandre Candido Soares ◽  
Michel Picanço Oliveira ◽  
Bárbara Ferreira de Oliveira ◽  
Artur Camposo Pereira ◽  
...  
Keyword(s):  
High Temperature ◽  
Spark Plasma ◽  
Temperature Applications

scholarly journals Fabrication and Characterization of Quinary High Entropy-Ultra-High Temperature Diborides

Ceramics ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 108-120
Author(s):  
Simone Barbarossa ◽  
Roberto Orrù ◽  
Valeria Cannillo ◽  
Antonio Iacomini ◽  
Sebastiano Garroni ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Phase ◽  
Nominal Composition ◽  
High Entropy ◽  
Chemical Complexity ◽  
Alternative Processing ◽  
Plasma Sintering ◽  
High Temperature Synthesis ◽  
Spark Plasma

Due to their inherent chemical complexity and their refractory nature, the obtainment of highly dense and single-phase high entropy (HE) diborides represents a very hard target to achieve. In this framework, homogeneous (Hf0.2Nb0.2Ta0.2Mo0.2Ti0.2)B2, (Hf0.2Zr0.2Ta0.2Mo0.2Ti0.2)B2, and (Hf0.2Zr0.2Nb0.2Mo0.2Ti0.2)B2 ceramics with high relative densities (97.4, 96.5, and 98.2%, respectively) were successfully produced by spark plasma sintering (SPS) using powders prepared by self-propagating high-temperature synthesis (SHS). Although the latter technique did not lead to the complete conversion of initial precursors into the prescribed HE phases, such a goal was fully reached after SPS (1950 °C/20 min/20 MPa). The three HE products showed similar and, in some cases, even better mechanical properties compared to ceramics with the same nominal composition attained using alternative processing methods. Superior Vickers hardness and elastic modulus values were found for the (Hf0.2Nb0.2Ta0.2Mo0.2Ti0.2)B2 and the (Hf0.2Zr0.2Ta0.2Mo0.2Ti0.2)B2 systems, i.e., 28.1 GPa/538.5 GPa and 28.08 GPa/498.1 GPa, respectively, in spite of the correspondingly higher residual porosities (1.2 and 2.2 vol.%, respectively). In contrast, the third ceramic, not containing tantalum, displayed lower values of these two properties (25.1 GPa/404.5 GPa). However, the corresponding fracture toughness (8.84 MPa m1/2) was relatively higher. This fact can be likely ascribed to the smaller residual porosity (0.3 vol.%) of the sintered material.

scholarly journals Fabrication and characterization of silicon oxycarbide fibre-mats via electrospinning for high temperature applications

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38446-38455
Author(s):  
Zhongkan Ren ◽  
Christel Gervais ◽  
Gurpreet Singh
Keyword(s):  
High Temperature ◽  
Silicon Oxycarbide ◽  
Fabrication And Characterization ◽  
Temperature Applications

Electrospinning of ceramic mats for high temperature applications.

Electrical and morphological characterization of platinum thin-films with various adhesion layers for high temperature applications

2015 ◽  
Vol 23 (3) ◽  
pp. 703-709 ◽  
Author(s):  
A. Ababneh ◽  
A. N. Al-Omari ◽  
A. M. K. Dagamseh ◽  
M. Tantawi ◽  
C. Pauly ◽  
...  
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
Morphological Characterization ◽  
Temperature Applications

Characterization of cellular ceramics for high-temperature applications

2008 ◽  
Vol 43 (19) ◽  
pp. 6556-6561 ◽  
Author(s):  
W. Acchar ◽  
E. G. Ramalho ◽  
F. B. M. Souza ◽  
W. L. Torquato ◽  
V. P. Rodrigues ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Applications
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