Compressive creep of SiC whisker/Ti3SiC2 composites at high temperature in air

Published on Sep 1, 2020in Journal of the American Ceramic Society3.502
· DOI :10.1111/JACE.17323
Apurv Dash6
Estimated H-index: 6
(Forschungszentrum Jülich),
Jürgen Malzbender47
Estimated H-index: 47
(Forschungszentrum Jülich)
+ 4 AuthorsJesus Gonzalez-Julian23
Estimated H-index: 23
(Forschungszentrum Jülich)
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Abstract The creep behaviours of the dense and porous Cr2AlC ceramics were investigated, being the first study on creep behaviour of not only Cr2AlC but also porous MAX phase. Creep rates of rather dense (2% of porosity) and porous Cr2AlC (53% and 75%) were measured in the temperature range 1073–1473 K during heating and subsequent cooling after high temperature exposure. The compressive creep tests were performed under stress range of 1–12 MPa. Creep rates of porous Cr2AlC were higher than the ...
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#1Apurv Dash (Forschungszentrum Jülich)H-Index: 6
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Abstract Titanium silicon carbide (Ti3SiC2) powder was synthesized by molten salt shielded synthesis route of elemental reactants. Potassium bromide (KBr) was used for gas-tight encapsulation of the consolidated reaction mixture for further high temperature processing. The synthesis of Ti3SiC2 powder was carried out in air, the salt cladding and molten salt pool provided for the protection of the material against oxidation both at low and high temperature. The process yielded free flowing Ti3SiC...
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#1Miguel LagosH-Index: 13
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Last. D. ScitiH-Index: 10
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Abstract MAX phases, and particularly Ti3SiC2, are interesting for high temperature applications. The addition of carbon fibers can be used to reduce the density and to modify the properties of the matrix. This work presents the densification and characterization of Ti3SiC2 based composites with short carbon fibers using a fast and simple fabrication approach: dry mixing and densification by Spark Plasma Sintering. Good densification level was obtained below 1400 °C even with a high amount of fi...
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#1Apurv Dash (Forschungszentrum Jülich)H-Index: 6
#2Robert Vaßen (Forschungszentrum Jülich)H-Index: 43
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To prevent spontaneous oxidation during the high-temperature synthesis of non-oxide ceramics, an inert atmosphere is conventionally required1,2. This, however, results in high energy demand and high production costs. Here, we present a process for the synthesis and consolidation of oxidation-prone materials, the ‘molten salt shielded synthesis/sintering’ process (MS3), which uses molten salts as a reaction medium and also to protect the ceramic powders from oxidation during high-temperature proc...
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#1It Meng Low (Curtin University)H-Index: 40
A critical overview of the various parameters, such as annealing atmospheres, pore microstructures, and pore sizes, that are critical in controlling the decomposition kinetics of Ti-based MAX phases is given in this paper. Ti-based MAX phases tend to decompose readily above 1400 °C during vacuum annealing to binary carbide (e.g., TiCx) or binary nitride (e.g., TiNx), primarily through the sublimation of A elements such as Al or Si, forming in a porous MXx surface layer. Arrhenius Avrami equation...
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#1Elodie Drouelle (University of Poitiers)H-Index: 3
#2A. Joulain (University of Poitiers)H-Index: 13
Last. Pierre SallotH-Index: 3
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Abstract The deformation mechanisms involved in the tensile creep of a Ti 3 AlC 2 specimen deformed, at 900 °C, to a 7.5% final strain are investigated through SEM and TEM observations. Tensile creep strain rate analyses on Ti 3 AlC 2 deformed at 900 °C enabled to identify a Norton's law with a n coefficient around 2, suggesting that creep mechanisms are controlled by grain boundary sliding. TEM observations revealed a highly heterogeneous microstructure consisting in both grains without any dis...
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#1Jesus Gonzalez-Julian (Forschungszentrum Jülich)H-Index: 23
#2Javier Llorente (CSIC: Spanish National Research Council)H-Index: 5
Last. Olivier Guillon (Forschungszentrum Jülich)H-Index: 35
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Abstract A new class of ceramic matrix composites based on Cr 2 AlC MAX-phase containing 5 and 10 wt.% of SiC fibers was developed in this investigation. The Cr 2 AlC/SiC composites were performed through two consecutives steps: i) synthesis of the pure Cr 2 AlC phase from its elemental constituents by reactive method under argon atmosphere at 1400 °C and particle size refinement, and ii) processing of Cr 2 AlC powder and SiC fibers followed by densification using the field assisted sintering te...
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#1Jesus Gonzalez-Julian (Forschungszentrum Jülich)H-Index: 23
#2Lukas Classen (Forschungszentrum Jülich)H-Index: 1
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Injection molding of Ti3SiC2, Ti2AlC, and Ti2AlC containing 10 wt% of SiC fibers has been investigated to enable the production of reliable complex near net shaped components. Gear wheels with 9 cogs, 32 mm external diameter, and 4 mm thickness have been successfully produced by injection and sintering, obtaining homogeneous components with the characteristic layered structure of the MAX phases and good surface quality with average roughness below 2 μm. Injection molding of MAX phases is reporte...
13 CitationsSource
#1Karine Gouriet (Lille University of Science and Technology)H-Index: 7
#2Philippe Carrez (Lille University of Science and Technology)H-Index: 16
Last. Christophe Tromas (Institut Pprime)H-Index: 24
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In this study, we determined the core structure and the Peierls stress of dislocations in Ti2AlN MAX phase. We use a generalized Peierls–Nabarro model, called Peierls–Nabarro–Galerkin (PNG), coupled with first principles calculations of generalized stacking fault (GSF). The GSF calculations show that dislocation glide in the basal plane will occur preferentially between M (here Ti) and A (here Al) planes. Additionally, the results of PNG calculations demonstrate that whatever the dislocation cha...
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#1Xiaoqiang Li (Forschungszentrum Jülich)H-Index: 32
Last. Jürgen MalzbenderH-Index: 47
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#1Laura SilvestroniH-Index: 33
#2Cesare MelandriH-Index: 23
Last. Jesus Gonzalez-Julian (Forschungszentrum Jülich)H-Index: 23
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Abstract The reactivity behaviour between a MAX phase and ZrB2 or WC was explored with the aim of developing novel composites by merging the benefits of the individual constituents. Hot pressing of Ti3SiC2 with 30 vol% ZrB2 at 1450 °C led to notable microstructure re-assessment with formation of inter-locked sub-micrometric boride grains. This composite displayed enhanced hardness and showed a strength over 430 MPa up to 1200 °C, which is a great achievement considering the ductile behaviour of ...
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#1Teresa Go (Forschungszentrum Jülich)H-Index: 4
#2Robert Vaßen (Forschungszentrum Jülich)H-Index: 13
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Abstract Three different ceramic matrix composites (CMCs) were produced using Cr2AlC as a matrix, and carbon, SiC and Al2O3 short fibers as a secondary phase. Cr2AlC powders were synthesized by solid-state reaction, followed by mixing with the fibers, and full densification using a field-assisted sintering technique. Of the three different fiber types, Carbon fibers reacted strongly with Cr2AlC, while the reaction with SiC fibers was more limited and alumina fibers didn’t show any reaction. Oxid...
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