Strength of hot pressed ZrB2–SiC composite after exposure to high temperatures (1000–1700 °C)

Patel, Manish; Reddy, Janardhan; Prasad, V.V. Bhanu; Jayaram, Vikram

doi:10.1016/j.jeurceramsoc.2012.06.025

Cited by 47 publications

(7 citation statements)

References 22 publications

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“…The ZrB 2 and SiC on the surface of the fiber are partially oxidized to form SiO 2 and ZrO 2 . The following equations list the possible reactions in the oxidation process 22 :

C false(normals false) + {normalO}_{2} false(normalg false) \to {CO}_{2} false(normalg false)

2 C false(normals false) + {normalO}_{2} false(normalg false) \to CO false(normalg false)

SiC false(normals false) + 1.5 {normalO}_{2} false(normalg false) \to {SiO}_{2} (s) + CO false(normalg false)

{ZrB}_{2} false(normals false) + 2.5 {normalO}_{2} false(normalg false) \to {ZrO}_{2} (s) + {normalB}_{2} {normalO}_{3} false(normall false)

{ZrO}_{2} false(normals false) + {SiO}_{2} false(normals false) \to {ZrSiO}_{4} (s)

…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

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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 the Scherrer equation. The polycrystalline fibers exhibit dense morphologies without any obvious holes or cracks. The tensile strength of the fibers was greater than 2.0 GPa, and their elastic modulus was ~380 GPa. After oxidation at 1200°C for 1 hour, the strength of the fibers did not decrease despite a small loss of elastic modulus. Compared to the advanced commercial SiC fibers of Tyranno SA, the fibers exhibited improved high‐temperature creep resistance in the temperature range 1300‐1500°C.

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“…The ZrB 2 and SiC on the surface of the fiber are partially oxidized to form SiO 2 and ZrO 2 . The following equations list the possible reactions in the oxidation process 22 :

C false(normals false) + {normalO}_{2} false(normalg false) \to {CO}_{2} false(normalg false)

2 C false(normals false) + {normalO}_{2} false(normalg false) \to CO false(normalg false)

SiC false(normals false) + 1.5 {normalO}_{2} false(normalg false) \to {SiO}_{2} (s) + CO false(normalg false)

{ZrB}_{2} false(normals false) + 2.5 {normalO}_{2} false(normalg false) \to {ZrO}_{2} (s) + {normalB}_{2} {normalO}_{3} false(normall false)

{ZrO}_{2} false(normals false) + {SiO}_{2} false(normals false) \to {ZrSiO}_{4} (s)

…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

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“…Relative density of ~99% with 560 MPa strength was achieved for the processed composite 61 . Patel et al 62 processed hot pressed ZrB 2 ‐(10‐30 vol%) SiC composites with B 4 C (1 wt%) as sintering additive. With higher SiC content, density decreased from 99.8% for ZrB 2 ‐(10 vol%) SiC to 97.5% for ZrB 2 ‐(30 vol%) SiC, whereas there was increase in hardness and fracture toughness with increasing SiC content.…”

Section: Processing Of Zrb2–sic Composites Via Conventional Hot Presmentioning

confidence: 99%

Review: Effect on physical, mechanical, and wear performance of ZrB₂‐based composites processed with or without additives

Verma

Чеверикин

Cozza

2020

Int J Applied Ceramic Tech

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Because of unique combination of properties, ultra high temperature ceramics (UHTCs) are considered the most suitable material for applications in extreme environments as in hypersonic flights, atmospheric reentry, and rocket propulsion system. Processing of UHTCs especially ZrB 2-based ceramic composites with additives offer advantages in terms of simple processing methodology and excellent properties. Processing route highly controls the ceramic properties. Present review share out systematically and explain the processing strategies of ZrB 2-based ceramic composites-conventional, hot press or spark plasma sintering and their effect on microstructure features, physical, and mechanical properties and tribological performance. Present review suggests that it is possible to process full dense ZrB 2-SiC ceramic composite with ultrafine or nano size particles via fast sintering technique like spark plasma sintering and gives better mechanical and wear resistant properties. K E Y W O R D S additives, ceramics, composites, conventional, spark plasma, wear 2510 | VERMA Et Al. the most promising candidate for leading edge material. It has high oxidation resistance as compared to other borides. UHTC prototype of a nose-cone produced and construction of strakes of space vehicles are shown in Figure 1B,C. Apart from their use in aerothermodynamics for extreme conditions, 14-18 UHTCs are also used in automotive applications as cutting tools, turbine blades, tube vanes, seals, bearings, wear guides, automotive engine components, nozzles, exhaust ducts, heat exchanger tubes, combustors, centrifuges, filters, substrates, air preheaters, wire drawing and extrusion dies, valve seats, high precision balls, bearings, plungers for chemical pumps. 19-21 ZrB 2 and ZrB 2-SiC composites are one of these class of ultra high temperature ceramic composites having incorporating SiC additions making the composite efficient in ultra-refractory properties by enhancing their oxidation resistance and the mechanical properties. 22-24 To increase strength, oxidation resistance, fracture toughness, and to prevent grain growth in ZrB 2 composite, SiC particles are added. SiC having strong covalent bond occur in many different crystal structures, called polytypes. 25-30 2 | SYNTHESIS AND DEVELOPMENT HISTORY OF ULTRA HIGH-TEMPERATURE CERAMICS Ultra high temperature ceramics (UHTCs) came into development in 1960s. 1 ZrB 2 has high hardness (>20 GPa), melting temperature (>3000°C), and elastic modulus F I G U R E 1 A, X43-A, a reusable hypersonic aerospace vehicle that would utilize UHTC leading edges and control surfaces; B, Image courtesy of NASA 9 Hot pressed UHTC nose-cone after shaping by EDM 12 ; C, Strakes (composed of three sections, each having a different UHTC composition) 18 [Color figure can be viewed at wileyonlinelibrary.com] Category Reaction Carbothermal ZrO 2 + B 2 O 3 + 5C → ZrB 2 + 5CO Borothermal ZrO 2 + 4B→ZrB 2 + B 2 O 2 Aluminothermal 3ZrO 2 + 3B 2 O 3 + 10Al → 3ZrB 2 + 5Al 2 O 3 Boro/Carbothermal Reduction 7ZrO 2 + 5B 4 C→7ZrB 2...

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“…The addition of SiC can also improve flexure strength, 4,5,8 K Ic 5,17 and creep behavior. 23 Oxidation behavior of ZrB 2 and some ZrB 2 /SiC composites (containing from 10 to 30 vol.% of SiC) has been well investigated in the temperature range from 800 to 2000 • C 5,6,[9][10][11][12][13][14][15][16]18,19,21 and recently well reviewed by Fahrenholtz and Hilmas. 20 Pure ZrB 2 undergoes oxidation starting from 800 • C according to the reaction: ZrB 2(s) + 5/2O 2(g) ↔ ZrO 2(s) + B 2 O 3(s,l) (1) The liquid layer of B 2 O 3 grants protection from oxidation up to 1100-1200 • C. Above 1200 • C the volatilization of B 2 O 3 , which exposes the underlying porous ZrO 2 scale, dramatically worsens the oxidation resistance of ZrB 2 .…”

Section: Introductionmentioning

confidence: 99%

“…5,[9][10][11][12][13][14][15][16][17][18][19][20][21] It consists of an external borosilicate glassy layer and an underlying layer made of a skeleton of crystalline ZrO 2 , with voids filled in by the glassy phase. The B 2 O 3 content within the glassy phase decreases with the temperature increase owing to evaporation and at around 1500 • C the glassy layer facing the atmosphere mainly consists of silica.…”

Section: Introductionmentioning

confidence: 99%

Oxidation behavior of ZrB2/SiC laminates: Effect of composition on microstructure and mechanical strength

Padovano

Badini

Celasco

et al. 2015

Journal of the European Ceramic Society

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Strength of hot pressed ZrB2–SiC composite after exposure to high temperatures (1000–1700 °C)

Cited by 47 publications

References 22 publications

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

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

Review: Effect on physical, mechanical, and wear performance of ZrB₂‐based composites processed with or without additives

Oxidation behavior of ZrB2/SiC laminates: Effect of composition on microstructure and mechanical strength

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Strength of hot pressed ZrB2–SiC composite after exposure to high temperatures (1000–1700 °C)

Cited by 47 publications

References 22 publications

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

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

Review: Effect on physical, mechanical, and wear performance of ZrB2‐based composites processed with or without additives

Oxidation behavior of ZrB2/SiC laminates: Effect of composition on microstructure and mechanical strength

Contact Info

Product

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

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

Review: Effect on physical, mechanical, and wear performance of ZrB₂‐based composites processed with or without additives