High‐Strength Zirconium Diboride‐Based Ceramics

Chamberlain, Adam L.; Fahrenholtz, William G.; Hilmas, Greg; Ellerby, Don

doi:10.1111/j.1551-2916.2004.01170.x

Cited by 769 publications

(592 citation statements)

References 12 publications

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“…7, the flexural strengths of the SiCZrB 2 composites, 290.54~1011.34MPa, at room temperature were twice as high as the flexural strength of SiC or ZrB 2 single crystal without porosity, 350~500 MPa and 512∼618 MPa, respectively, except SZ30 and SZ50 [18]- [19]. In general, the flexural strength is closely related to the grain growth of annealed ceramic.…”

Section: Mechanical Propertiesmentioning

confidence: 72%

The Development of an Electroconductive SiC-ZrB₂Composite through Spark Plasma Sintering under Argon Atmosphere

Lee¹,

Ju²,

Kim³

et al. 2010

Journal of Electrical Engineering and Technology

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-The SiC-ZrB 2 composites were fabricated by combining 30, 35, 40, 45 and 50 vol. % of zirconium diboride (ZrB 2 ) powders with silicon carbide (SiC) matrix. The SiC-ZrB 2 composites and the sintered compacts were produced through spark plasma sintering (SPS) under argon atmosphere, and its physical, electrical, and mechanical properties were examined. Also, the thermal image analysis of the SiC-ZrB 2 composites was examined. Reactions between β-SiC and ZrB 2 were not observed via x-ray diffraction (XRD) analysis. The apparent porosity of the SiC+30vol.%ZrB 2 , SiC+35vol.%ZrB 2 , SiC+40vol.%ZrB 2, SiC+45vol.%ZrB 2 and SiC+50vol.%ZrB 2 composites were 7.2546, 0.8920, 0.6038, 1.0981, and 10.0108%, respectively. The XRD phase analysis of the sintered compacts demonstrated a high phase of SiC and ZrB 2 . Among the SiC+ZrB 2 composites, the SiC+50vol. %ZrB 2 composite had the lowest flexural strength, 290.54MPa, the other composites had more than 980MPa flexural strength except the SiC+30vol.%ZrB 2 composite; the SiC+40vol.%ZrB 2 composite had the highest flexural strength, 1011.34MPa, at room temperature. The electrical properties of the SiC-ZrB 2 composites had positive temperature coefficient resistance (PTCR). The V-I characteristics of the SiC-ZrB 2 composites had a linear shape in the temperature range from room to 500℃. The electrical resistivities of the SiC+30vol.%ZrB 2 , SiC+35vol.%ZrB 2 , SiC+40vol.%ZrB 2 SiC+45vol.%ZrB 2 and SiC+50vol.%ZrB 2 composites were 4.573×10 -3 , 1.554×10 -3 , 9.365×10 -4 , 6.999×10 -4 , and 6.069×10 -4 Ω·cm, respectively, at room temperature, and their resistance temperature coefficients were 1.896×10 -3 , 3.064×10 -3 , 3.169×10 -3 , 3.097×10 -3 , and 3.418×10 -3 /℃ in the temperature range from room to 500℃, respectively. Therefore, it is considered that among the sintered compacts the SiC+35vol.%ZrB 2 , SiC+40vol.%ZrB 2 and SiC+45vol.%ZrB 2 composites containing the most outstanding mechanical properties as well as PTCR and V-I characteristics can be used as an energy friendly ceramic heater or ohmic-contact electrode material through SPS.

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Section: Mechanical Propertiesmentioning

confidence: 72%

The Development of an Electroconductive SiC-ZrB₂Composite through Spark Plasma Sintering under Argon Atmosphere

Lee¹,

Ju²,

Kim³

et al. 2010

Journal of Electrical Engineering and Technology

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“…Mechanical properties of the ceramic composites under investigation were listed in Table 2. Compared with 270-480 MPa of pure ZrB 2 ceramic [30], the strength of ZSwG5 and ZSwG10 ceramic composites were both enhanced by the addition of SiC w and graphene nanosheets. With the volume fraction of graphene increased, the strength decreased from 764 MPa (ZSwG5) to 681 MPa (ZSwG10).…”

Section: Resultsmentioning

confidence: 95%

Effect of SiC whiskers and graphene nanosheets on the mechanical properties of ZrB2-SiCw-Graphene ceramic composites

Gui

2016

Ceramics International

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a b s t r a c tUltrahigh temperature ZrB 2 -SiC w -Graphene ceramic composites are fabricated by hot pressing ZrB 2 -SiC w -Graphene oxide powders at 1950°C and 30 MPa for 1 h. The microstructures of the composites are characterized by Scanning electron microscopy, Raman spectroscopy and X-ray diffraction. The results show that multilayer graphene nanosheets are achieved by thermal reduction of graphene oxide during sintering process. Compared with monolithic ZrB 2 materials, flexural strength and fracture toughness are both improved due to the synergistic effect of SiC whisker and graphene nanosheets. The toughening mechanisms mainly are the combination of SiC whisker and graphene nanosheets crack bridging, pulling out.

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“…ZrB 2 based ceramics have attracted much attention especially in the areas where wear-corrosion-oxidation resistance is demanded; such as high temperature electrodes, molten metal crucibles, thermal protection systems for hypersonic flights, atmospheric re-entry vehicles, rocket propulsion systems, and nose caps [2][3][4]. However, ZrB 2 is not only difficult to sinter, but also by itself does not meet all the necessary requirements demanded by the extreme conditions encountered in the aerospace engineering [5,6].…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical synthesis of ZrB2–SiC–ZrC nanocomposite powder by metallothermic reduction of zircon

Jalaly

Tamizifar

Bafghi

et al. 2013

Journal of Alloys and Compounds

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Aluminium and magnesium were used in the M/ZrSiO 4 /B 2 O 3 /C (M=Al, Mg) system to induce a mechanically induced self-sustaining reaction (MSR). Aluminium was not able to reduce the system to the desired products, and the system became amorphous after 10 hours milling. However, Nanocomposite powder of ZrB 2 -SiC-ZrC was in-situ synthesized by the magnesiothermic reduction with an ignition time of approximately 6 minutes. The mechanism for the formation of the product in this system was determined by studying the relevant sub-reactions.

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High‐Strength Zirconium Diboride‐Based Ceramics

Cited by 769 publications

References 12 publications

The Development of an Electroconductive SiC-ZrB₂Composite through Spark Plasma Sintering under Argon Atmosphere

The Development of an Electroconductive SiC-ZrB₂Composite through Spark Plasma Sintering under Argon Atmosphere

Effect of SiC whiskers and graphene nanosheets on the mechanical properties of ZrB2-SiCw-Graphene ceramic composites

Mechanochemical synthesis of ZrB2–SiC–ZrC nanocomposite powder by metallothermic reduction of zircon

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High‐Strength Zirconium Diboride‐Based Ceramics

Cited by 769 publications

References 12 publications

The Development of an Electroconductive SiC-ZrB2Composite through Spark Plasma Sintering under Argon Atmosphere

The Development of an Electroconductive SiC-ZrB2Composite through Spark Plasma Sintering under Argon Atmosphere

Effect of SiC whiskers and graphene nanosheets on the mechanical properties of ZrB2-SiCw-Graphene ceramic composites

Mechanochemical synthesis of ZrB2–SiC–ZrC nanocomposite powder by metallothermic reduction of zircon

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The Development of an Electroconductive SiC-ZrB₂Composite through Spark Plasma Sintering under Argon Atmosphere

The Development of an Electroconductive SiC-ZrB₂Composite through Spark Plasma Sintering under Argon Atmosphere