Hydrodynamic compressibility of silicon carbide through shock compression of metal‐ceramic mixtures

1994 ◽  
Vol 75 (1) ◽  
pp. 197-202 ◽  
Author(s):  
D. E. Grady
Keyword(s):  
Silicon Carbide ◽  
Shock Compression ◽  
Metal Ceramic

scholarly journals Mechanical properties of wood-derived silicon carbide aluminum-alloy composites as a function of temperature

2008 ◽  
Vol 23 (6) ◽  
pp. 1732-1743 ◽  
Author(s):  
T.E. Wilkes ◽  
J.Y. Pastor ◽  
J. Llorca ◽  
K.T. Faber
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Aluminum Alloy ◽  
Mechanical Behavior ◽  
Load Transfer ◽  
Ceramic Composites ◽  
Metal Ceramic ◽  
Strength And Toughness

The mechanical behavior [i.e., stiffness, strength, and toughness (KIC)] of SiC Al–Si–Mg metal–ceramic composites (50:50 by volume) was studied at temperatures ranging from 25 to 500 °C. The SiC phase was derived from wood precursors, which resulted in an interconnected anisotropic ceramic that constrained the pressure melt-infiltrated aluminum alloy. The composites were made using SiC derived from two woods (sapele and beech) and were studied in three orthogonal orientations. The mechanical properties and corresponding deformation micromechanisms were different in the longitudinal (LO) and transverse directions, but the influence of the precursor wood was small. The LO behavior was controlled by the rigid SiC preform and the load transfer from the metal to the ceramic. Moduli in this orientation were lower than the Halpin–Tsai predictions due to the nonlinear and nonparallel nature of the Al-filled pores. The LO KIC agreed with the Ashby model for the KIC contribution of ductile inclusions in a brittle ceramic.

Interfacial Reaction Mechanism between Molten Ag-Cu-Based Active Brazing Alloys and Untreated or Pre-Oxidized PLS-SiC

MRS Advances ◽  
2019 ◽  
Vol 4 (57-58) ◽  
pp. 3153-3161
Author(s):  
J. López-Cuevas ◽  
J.C. Rendón-Angeles ◽  
J.L. Rodríguez-Galicia ◽  
C.A. Gutiérrez-Chavarría
Keyword(s):  
Silicon Carbide ◽  
Reaction Mechanism ◽  
Interfacial Reaction ◽  
Sessile Drop ◽  
Chemical Interaction ◽  
Sessile Drop Method ◽  
Holding Time ◽  
Drop Method ◽  
Metal Ceramic ◽  
Sintered Silicon

ABSTRACTBased on wettability and reaction interfaces previously reported, as well as on thermodynamic considerations, a likely mechanism has been proposed for the chemical interaction taking place at the metal/ceramic interface during wettability experiments carried out by the so-called “sessile drop” method. The experiments involved three Ag-Cu-based brazing alloys [Cusil (Ag-28wt.%Cu), Cusil-ABA (Ag-34.6wt.%Cu-1.58wt.%Ti) and Incusil-ABA (Ag-26.6wt.%Cu-12.4wt.%In-0.89wt.%Ti)] and as polished and pre-oxidized pressure-less sintered silicon carbide (PLS-SiC), with a total holding time of 90 minutes at 850 °C, under a Zr sponge-gettered vacuum of 10-4/10-5 Torr.

scholarly journals A multiscale experimental analysis of mechanical properties and deformation behavior of sintered copper–silicon carbide composites enhanced by high-pressure torsion

2021 ◽  
Vol 21 (3) ◽  
Author(s):  
Szymon Nosewicz ◽  
Piotr Bazarnik ◽  
Melanie Clozel ◽  
Łukasz Kurpaska ◽  
Piotr Jenczyk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
High Pressure ◽  
Metal Matrix ◽  
High Pressure Torsion ◽  
Multiscale Approach ◽  
Damage Behavior ◽  
Microtensile Testing ◽  
Metal Ceramic ◽  
The Impact

AbstractExperiments were conducted to investigate, within the framework of a multiscale approach, the mechanical enhancement, deformation and damage behavior of copper–silicon carbide composites (Cu–SiC) fabricated by spark plasma sintering (SPS) and the combination of SPS with high-pressure torsion (HPT). The mechanical properties of the metal–matrix composites were determined at three different length scales corresponding to the macroscopic, micro- and nanoscale. Small punch testing was employed to evaluate the strength of composites at the macroscopic scale. Detailed analysis of microstructure evolution related to SPS and HPT, sample deformation and failure of fractured specimens was conducted using scanning and transmission electron microscopy. A microstructural study revealed changes in the damage behavior for samples processed by HPT and an explanation for this behavior was provided by mechanical testing performed at the micro- and nanoscale. The strength of copper samples and the metal–ceramic interface was determined by microtensile testing and the hardness of each composite component, corresponding to the metal matrix, metal–ceramic interface, and ceramic reinforcement, was measured using nano-indentation. The results confirm the advantageous effect of large plastic deformation on the mechanical properties of Cu–SiC composites and demonstrate the impact on these separate components on the deformation and damage type.

Shock compression of diamonds in silicon carbide matrix up to 110 GPa

2020 ◽  
Vol 128 (24) ◽  
pp. 245901
Author(s):  
Yuanyuan Li ◽  
Xiuxia Cao ◽  
Yin Yu ◽  
Xuhai Li ◽  
Lu Zhang ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Shock Compression ◽  
Carbide Matrix ◽  
Silicon Carbide Matrix

Effect of Catalyst on the Preparation of Silicon Carbide Whiskers from Silica and Carbon

2007 ◽  
Vol 336-338 ◽  
pp. 1304-1306
Author(s):  
Mu Wen Xie ◽  
Long Hao Qi ◽  
Qiang Xu
Keyword(s):  
Silicon Carbide ◽  
Fibrous Material ◽  
High Strength ◽  
Thermal Reduction ◽  
Reduction Reaction ◽  
Subsequent Evolution ◽  
Silicon Carbide Whiskers ◽  
Nickel Cobalt ◽  
Metal Ceramic ◽  
Iron Nickel

Silicon carbide whiskers (SiCw) as a kind of high strength fibrous material are widely used in the reinforcement of metal, ceramic and polymer. In this paper preparation of Silicon carbide whiskers by carbon thermal reduction reaction from the mixture of Silica and carbon was investigated with an emphasis on the study of the effect of catalyst. Fe, Co, Ni and their compounds were used as catalyst in this study. Since vapor–liquid–solid (VLS) mechanism was found to be responsible for the growth of whiskers, the formation of catalyst and its subsequent evolution on whisker nucleation, growth and appearance was a subject of extensive research. The catalyst that has the best effect among iron, nickel, cobalt and their compounds was made certain by comparing the products.

scholarly journals Influence of Material Coating on the Heat Transfer in a Layered Cu-SiC-Cu Systems

2017 ◽  
Vol 62 (2) ◽  
pp. 1311-1314
Author(s):  
A. Strojny-Nędza ◽  
K. Pietrzak ◽  
M. Teodorczyk ◽  
M. Basista ◽  
W. Węglewski ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Thermal Properties ◽  
High Temperature ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Plasma Sintering ◽  
Metal Ceramic ◽  
Spark Plasma

AbstractThis paper describes the process of obtaining Cu-SiC-Cu systems by way of spark plasma sintering. A monocrystalline form of silicon carbide (6H-SiC type) was applied in the experiment. Additionally, silicon carbide samples were covered with a layer of tungsten and molybdenum using chemical vapour deposition (CVD) technique. Microstructural examinations and thermal properties measurements were performed. A special attention was put to the metal-ceramic interface. During annealing at a high temperature, copper reacts with silicon carbide. To prevent the decomposition of silicon carbide two types of coating (tungsten and molybdenum) were applied. The effect of covering SiC with the aforementioned elements on the composite’s thermal conductivity was analyzed. Results were compared with the numerical modelling of heat transfer in Cu-SiC-Cu systems. Certain possible reasons behind differences in measurements and modelling results were discussed.

scholarly journals Investigations of Interface Properties in Copper-Silicon Carbide Composites

2017 ◽  
Vol 62 (2) ◽  
pp. 1315-1318 ◽  
Author(s):  
M. Chmielewski ◽  
K. Pietrzak ◽  
A. Strojny-Nędza ◽  
D. Jarząbek ◽  
S. Nosewicz
Keyword(s):  
Silicon Carbide ◽  
Vapour Deposition ◽  
Adhesion Force ◽  
Laser Flash ◽  
Copper Matrix ◽  
Flash Method ◽  
Plasma Sintering ◽  
Metal Ceramic ◽  
Spark Plasma ◽  
Sic Composites

AbstractThis paper analyses the technological aspects of the interface formation in the copper-silicon carbide composite and its effect on the material’s microstructure and properties. Cu-SiC composites with two different volume content of ceramic reinforcement were fabricated by hot pressing (HP) and spark plasma sintering (SPS) technique. In order to protect SiC surface from its decomposition, the powder was coated with a thin tungsten layer using plasma vapour deposition (PVD) method. Microstructural analyses provided by scanning electron microscopy revealed the significant differences at metal-ceramic interface. Adhesion force and fracture strength of the interface between SiC particles and copper matrix were measured. Thermal conductivity of composites was determined using laser flash method. The obtained results are discussed with reference to changes in the area of metal-ceramic boundary.

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