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article

Flame spraying of adherent silicon coatings on SiC substrates

A. Nistal, E. García, C. García-Diego, M.I. Osendi, more

Surface & Coatings Technology > 2015 > 270 > Complete > 8-15

Thermally sprayed silicon coatings seem a good bond coat option for state of art environmental barrier coatings (EBCs) aimed at protecting the high temperature ceramic components of the next generation of gas turbine engines. In this paper, Si has been flame sprayed, by tailoring the spraying parameters and substrate roughness for achieving well adhered, dense Si coatings over SiC substrates. Thermal...

article

A Review on Mechanical and Tribological Behaviors of Stir Cast Aluminum Matrix Composites.

Himanshu Kala, K.K.S. Mer, Sandeep Kumar, H. Kala, more

Procedia Materials Science > 2014 > 6 > Complete > 1951-1960

In the past few years the global need for low cost, high performance and good quality materials has caused a shift in research from monolithic to composite materials. In case of MMC's, aluminum matrix composite due their high strength to weight ratio, low cost and high wear resistance are widely manufactured and used in structural applications along with aerospace and automobile industry. Also a simple...

article

Ion distribution and electronic stopping power for Au ions in silicon carbide

K. Jin, Y. Zhang, H. Xue, Z. Zhu, more

Nuclear Inst. and Methods in Physics Research, B > 2013 > 307 > Complete > 65-70

Accurate knowledge of ion distribution and electronic stopping power for heavy ions in light targets is highly desired due to the large errors in prediction by the widely used Stopping and Range of Ions in Matter (SRIM) code. In this study, Rutherford backscattering spectrometry (RBS) and secondary ion mass spectrometry (SIMS) are used as complementary techniques to determine the distribution of Au...

article

Ultra Heat-Shock Resistant Die Attachment for Silicon Carbide With Pure Zinc

K. Suganuma, S. Kim

IEEE Electron Device Letters > 2010 > 31 > 12 > 1467 - 1469

An ultra heat-shock resistant die-attach structure for a silicon carbide power device was developed. A silicon carbide die with a gold/titanium nitride coating was soldered with pure zinc onto a DBC with a silicon nitride insulator plate. This die-attach structure could resist severe thermal shock in air temperatures between $-\hbox{50}\ ^{\circ}\hbox{C}$ and 300 $^{\circ}\hbox{C}$ . No substantial change...

article

Studies on processing of layered oxide‐bonded porous sic ceramic filter materials

Atanu Dey, Nijhuma Kayal, Omprakash Chakrabarti, Nilo M. Fortes, more

International Journal of Applied Ceramic Technology > 18 > 3 > 869 - 879

Oxide‐bonded porous SiC ceramic filter supports were prepared using SiC powder (d₅₀ = 212 µm), Al₂O₃, and clay as bond forming additives and graphite as pore former following reaction bonding of powder compacts at 1400°C in air. Reaction bonding characteristics, phase composition, porosity, pore size, mechanical strength, and microstructure of porous SiC ceramic supports were investigated. Mullite...

article

Optimizing the fiber push‐out method to evaluate interfacial failure in SiC/BN/SiC ceramic matrix composites

Robin M. G. De Meyere, Louise Gale, Stephen Harris, Ian M. Edmonds, more

Journal of the American Ceramic Society > 104 > 6 > 2741 - 2752

The investigation of several parameters during fiber push‐out micromechanical tests on the interfacial shear strength (ISS) of the BN interphase in SiC_f/SiC ceramic matrix composites (CMC) was undertaken to optimize experimental work. The SiC_f/SiC composites—candidate materials for jet engine components—were manufactured with varying fiber types and interlayer thicknesses. Experimental parameters...

article

Elementary gas‐phase reactions of radical species during chemical vapor deposition of silicon carbide using CH₃SiCl₃

Noboru Sato, Yuichi Funato, Kohei Shima, Hidetoshi Sugiura, more

International Journal of Chemical Kinetics > 53 > 5 > 638 - 645

We established a kinetic model (the UT2017 model) for chemical vapor deposition of silicon carbide (SiC) from methyltrichlorosilane (CH₃SiCl₃, MTS)/H₂, and quantitatively identified CH₂SiCl₃ as one of the SiC film‐forming species. In a previous study, we established a kinetic model (the UT2014 model), which reproduced the overall decomposition of MTS, but had not validated it in terms of radicals...

article

Hall Effect Characterization of α‐Irradiated p‐Type 4H‐SiC

Clint D. Frye, John W. Murphy, Qinghui Shao, Lars F. Voss, more

physica status solidi (b) > 258 > 3 > n/a - n/a

Most electrical characterization of radiation damage to semiconductors is conducted on full devices or on low‐doped material. However, evaluating the radiation hardness is challenging in less mature semiconductor systems where low‐doped material is unavailable and full devices are difficult to realize. Herein, temperature‐dependent Hall effect measurements are used to demonstrate α particle‐induced...

article

Oxidation of 3D‐printed SiC in air and steam environments

Kenneth Kane, Padraig Stack, Danny Schappel, Katherine Montoya, more

Journal of the American Ceramic Society > 104 > 5 > 2225 - 2237

The high‐temperature oxidation of additively manufactured and chemically vapor infiltrated (3D‐printed SiC) has been compared to chemical vapor deposited (CVD) SiC. 100‐h isothermal exposures were conducted at 1425° and 1300°C at 1 atm under both dry air and steam environments. A SiC reaction tube was utilized to reduce silica volatility. After steam oxidation at 1425° and 1300°C, on the 3D‐printed...

article

The effect of the third invariant on the strength and failure of boron carbide and silicon carbide

Timothy Holmquist, Sidney Chocron, Art Nicholls

Journal of the American Ceramic Society > 104 > 5 > 2348 - 2357

This article presents new test data to assess the effect the third invariant has on the strength and failure of two ceramic materials: boron carbide and silicon carbide. Two experimental techniques are used: the Brazilian test that produces a biaxial state of stress, and a new technique that uses a high‐pressure confinement vessel to load a specially designed dumbbell specimen in triaxial extension...

article

Making lightweight SiC(rGO, xMoSi₂) bulk ceramics via polymeric precursor route

Rongqian Yao, Yinong Zheng, Chao Jin, Wenyan Huang, more

Journal of the American Ceramic Society > 104 > 5 > 1959 - 1965

Unique properties of MoSi₂ open new opportunities for preparing bulk polymer‐derived ceramics (PDCs) displaying favorable structural‐functional capabilities. Herein, an ingenious production route via re‐pyrolysis process of ball‐milling‐induced rigid SiC(rGO, xMoSi₂)_p fillers/flexible polycarbosilane‐vinyltriethoxysilane‐graphene oxide (PCS‐VTES‐GO, PVG) precursors blends is proposed to obtain in...

article

Fabrication of C/C‐SiC composites using high‐char‐yield resin

Jinhua Yang, Yingjun Ai, Xiaoxu Lv, Zhe Qi, more

International Journal of Applied Ceramic Technology > 18 > 2 > 449 - 456

Carbon fiber reinforced ceramic matrix composites (C/C‐SiC composites) were fabricated using a type of high‐char‐yield phenolic resin with the char yield of 81.17 wt.%. Firstly, the fabric prepreg was prepared by spreading the phenolic resin solution onto the two dimensional carbon fiber plain weave fabric and dried consequently. Afterward, the resin was cured and then the carbon fiber reinforced...

article

Transmission electron microscopy study of extended defect evolution and amorphization in SiC under Si ion irradiation

Jean‐Marc Costantini, Joël Ribis

Journal of the American Ceramic Society > 104 > 4 > 1863 - 1873

The damage induced in 3C‐SiC epilayers on a silicon wafer by 2.3‐MeV Si ion irradiation for fluences of 10¹⁴, 10¹⁵, and 10¹⁶ cm⁻², was studied by conventional and high‐resolution transmission electron microscopy (TEM/HRTEM). The evolution of extended defects and lattice disorder is followed in both the 3C‐SiC film and Si substrate as a function of ion fluence, with reference to previous FTIR spectroscopy...

article

Oxidation resistance and thermal stability of the SiC‐ZrB₂ composite ceramic fibers

Hao Zhang, Min Ge, Huifeng Zhang, Weijia Kong, more

Journal of the American Ceramic Society > 104 > 4 > 1633 - 1640

In this study, continuous SiC‐ZrB₂ composite ceramic fibers were synthesized from a novel pre‐ceramic polymer of polyzirconocenecarbosilane (PZCS) via melt spinning, electron beam cross‐linking, pyrolysis, and finally sintering at 1800°C under argon. The ZrB₂ particles with an average grain size of 30.7 nm were found to be uniformly dispersed in the SiC with a mean size of 59.7 nm, as calculated using...

article

Na₂SO₄ deposit‐induced hot corrosion of BN‐coated α‐SiC

L. A. Herweyer, E. J. Opila

Journal of the American Ceramic Society > 104 > 3 > 1539 - 1553

BN coated α‐SiC was exposed to ~2.5 mg/cm² of Na₂SO₄ for 0.75‐144 hours between 700°C and 1100°C in a 0.1% SO₂‐O₂ gaseous environment. A combination of SEM, EDS, ICP‐OES, XRD, and optical profilometry was used to determine that BN induced a previously unobserved form of Na₂SO₄ deposit‐induced hot corrosion of SiC below the melting temperature of Na₂SO₄ (T_m = 884°C). Above the melting temperature of...

article

Electrodynamic Force, Casimir Effect, and Stiction Mitigation in Silicon Carbide Nanoelectromechanical Switches

Rui Yang, Jiang Qian, Philip X.‐L. Feng

Small > 16 > 51 > n/a - n/a

Logic switches enabled by nanoelectromechanical systems (NEMS) offer abrupt on/off‐state transition with zero off‐state leakage and minimal subthreshold swing, making them uniquely suited for enhancing mainstream electronics in a range of applications, such as power gating, high‐temperature and high‐voltage logic, and ultralow‐power circuits requiring zero standby leakage. As NEMS switches are scaled...

article

SiC‐based porous ceramic carriers for heat‐conductive phase change materials through carbothermal reduction method

Xiaoqian Liu, Yang Zhou, Xufeng Liu, Runfeng Li, more

International Journal of Applied Ceramic Technology > 18 > 1 > 91 - 99

Iron tailings remain the environment‐damaging waste from the iron ore, and high porosity porous ceramics are an attractive material to “turn waste into treasure.” To improve the thermal conductivity, porous ceramics with high silicon carbide content have been prepared by carbothermal reduction sintering process using argillaceous fine‐grained iron tailings with high silica content. The carbothermal...

article

Effect of Al contained in polymer‐derived SiC crystals on creating stable crystal grain boundaries

Ryutaro Usukawa, Toshihiro Ishikawa

International Journal of Applied Ceramic Technology > 18 > 1 > 6 - 11

Si‐Al‐C‐O materials are well‐known as a good precursor material for obtaining a dense, excellent heat‐resistant SiC polycrystalline materials. Although it has been found that the aluminum contained in Si‐Al‐C‐O materials plays an important role in obtaining dense SiC materials, its actual behavior during heat‐treatment processes has not been investigated. In this study, we investigated the behavior...

article

Intrinsic microstructures of silica‐bonded porous nano‐SiC ceramics

Rohit Malik, Young‐Wook Kim, Woo H. Nam

Journal of the American Ceramic Society > 104 > 2 > 706 - 710

Silica‐bonded porous SiC ceramics were fabricated using nano‐β‐SiC powder‐carbon black template compacts by sintering in air at 600°C‐1200°C. The intrinsic microstructures of the porous ceramics were characterized by high‐resolution transmission electron microscopy, which led to the following observations: (a) a core (SiC)‐shell (SiO₂) structure was formed, owing to the partial oxidation of nano‐SiC...

article

Rapid synthesis of nanostructured porous silicon carbide from biogenic silica

Joakim Riikonen, Jimi Rantanen, Rinez Thapa, Nguyen T. Le, more

Journal of the American Ceramic Society > 104 > 2 > 766 - 775

Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high‐performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self‐propagating high‐temperature synthesis (SHS) route was developed. The produced biogenic material...

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Search results

Flame spraying of adherent silicon coatings on SiC substrates

A Review on Mechanical and Tribological Behaviors of Stir Cast Aluminum Matrix Composites.

Ion distribution and electronic stopping power for Au ions in silicon carbide

Ultra Heat-Shock Resistant Die Attachment for Silicon Carbide With Pure Zinc

Studies on processing of layered oxide‐bonded porous sic ceramic filter materials

Optimizing the fiber push‐out method to evaluate interfacial failure in SiC/BN/SiC ceramic matrix composites

Elementary gas‐phase reactions of radical species during chemical vapor deposition of silicon carbide using CH₃SiCl₃

Hall Effect Characterization of α‐Irradiated p‐Type 4H‐SiC

Oxidation of 3D‐printed SiC in air and steam environments

The effect of the third invariant on the strength and failure of boron carbide and silicon carbide

Making lightweight SiC(rGO, xMoSi₂) bulk ceramics via polymeric precursor route

Fabrication of C/C‐SiC composites using high‐char‐yield resin

Transmission electron microscopy study of extended defect evolution and amorphization in SiC under Si ion irradiation

Oxidation resistance and thermal stability of the SiC‐ZrB₂ composite ceramic fibers

Na₂SO₄ deposit‐induced hot corrosion of BN‐coated α‐SiC

Electrodynamic Force, Casimir Effect, and Stiction Mitigation in Silicon Carbide Nanoelectromechanical Switches

SiC‐based porous ceramic carriers for heat‐conductive phase change materials through carbothermal reduction method

Effect of Al contained in polymer‐derived SiC crystals on creating stable crystal grain boundaries

Intrinsic microstructures of silica‐bonded porous nano‐SiC ceramics

Rapid synthesis of nanostructured porous silicon carbide from biogenic silica

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