Effects of thermal load on mechanical properties and microstructures of 3D SiO2f/Si3N4–BN composites using polyborosilazane

Jiang, Yonggang; Zhang, C.R.; Cao, Feng; Wang, S.Q.; Hu, Hai Feng; Cao, Yingbin

doi:10.1016/j.msea.2007.10.052

Cited by 16 publications

(13 citation statements)

References 15 publications

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“…The polymer infiltration and pyrolysis (PIP) process is a fast route to fabricate dense 3D SiO 2f /Si 3 N 4 -BN composites using PBSZ due to its good wettability with quartz fibers and high ceramic yield. This 3D SiO 2f /Si 3 N 4 -BN nitride composite exhibited a low ablation recession rate of 0.038 mm/s during kerosene-liquid oxygen ablation tests after exposing to a near constant heat flux of 8 MW/m 2 with a temperature of about 1925 C from a nozzle distance of 110 mm at interangle between the impinging heat flux and the specimen plane was 30 [83]. Figure 30a shows that the ablation area is shaped like a pear and the specimen is in good condition (Fig.…”

Section: Fused Silica-boron Nitride-silicon Nitride Composites (Nitromentioning

confidence: 96%

“…The various methods and additives utilized so far for enhancing the strength of the fused silica ceramics are summarized in Table 12. The fused-silica composites produced so far are nano-sized silica-silica [70], silica fibers (SiO 2f ) reinforcedsilica [8,82], 3D SiO 2f -SiO 2 [80,83], 2.5D braided silica fibers reinforced nitride (SFRN) [84], silicon nitride (Si 3 N 4 )-doped silica [85], air-oxidized silica and Si 3 N 4 [86], zirconia (ZrO 2 ) doped silica [34], alumina doped silica [87], β-Si 4 Al 2 O 2 N 6silica [10,88,89], and BN-silica [44][45][46][47][48]90] as listed in Table 12 [1,2,4,5,36,61]. Various dopants were also added to confer different properties to fused silica ceramics consolidated by several techniques [1,2].…”

Section: Fused-silica Ceramic Composites With Other Materialsmentioning

confidence: 99%

“…However, high-temperature oxidation of BN and Si 3 N 4 is also inevitable, which will deteriorate the mechanical and dielectric properties along with the ablation resistance of the fused silica matrix, especially for BN-reinforced fused silica ceramics. In a study, the 3D SiO 2f /Si 3 N 4 -BN composites were prepared with three infiltration-cure-pyrolysis cycles using hybrid preceramic precursor polyborosilazane (PBSZ) [83]. The polymer infiltration and pyrolysis (PIP) process is a fast route to fabricate dense 3D SiO 2f /Si 3 N 4 -BN composites using PBSZ due to its good wettability with quartz fibers and high ceramic yield.…”

Section: Fused Silica-boron Nitride-silicon Nitride Composites (Nitromentioning

confidence: 99%

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Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Ganesh¹,

Mahajan²

2020

Handbook of Advanced Ceramics and Composites

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Today, the development of ceramic radome materials for hyper velocity (> Mach 5) missiles is a top research priority for several countries for the purposes of both surveillance and combat. The ceramic materials with low and stable dielectric properties against frequency and temperature variation among others are especially important. The radome property requirement for missiles launched from surface-toair, air-to-surface, and air-to-air differs considerably. Moisture absorbing materials despite having desired dielectric and thermal properties are not suitable for radome applications as the dielectric constant of water is considerably huge (80.4). So far no single material has been identified to meet all the requirements of a high-speed radome application. The advantages and disadvantages associated with various ceramic radome materials have been presented and discussed in this chapter together with the information about the radome design with respect to the wall thickness vs. radar frequency (RF) signals, bore-sight error, and the importance as well as generation principle of Ogive radome shape. Among various materials investigated so far, the slip-cast fused silica (SCFS) has been identified to be superior for hypervelocity radome applications. Furthermore, SCFS radomes can be fabricated with near-net shape using aqueous colloidal suspensions. However, SCFS radomes suffer from poor mechanical strength and from low rain and abrasion resistance properties apart from having considerably high internal porosity (up to 18%). Various methods employed so far to improve the properties of SCFS radomes required for hypervelocity applications have been reviewed in this chapter while citing all the important references. Among the various fused-silica composites, the Nitroxyceram (SiO 2-BN-Si 3 N 4 composite) exhibits the best combination of properties required for radome applications, and it can be consolidated and densified by following conventional powder processing techniques prevalent at industry.

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Section: Fused Silica-boron Nitride-silicon Nitride Composites (Nitromentioning

confidence: 96%

Section: Fused-silica Ceramic Composites With Other Materialsmentioning

confidence: 99%

Section: Fused Silica-boron Nitride-silicon Nitride Composites (Nitromentioning

confidence: 99%

See 1 more Smart Citation

Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Ganesh¹,

Mahajan²

2020

Handbook of Advanced Ceramics and Composites

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“…The growth of branched Si 3 N 4 ceramics was attributed to a vapor-liquid-solid mechanism [122]. Jiang et al [124,125] fabricated quartz fiber reinforced nitride composites (Si 3 N 4 -BN) by polyborosilazane pyrolysis. The results showed that the composite processes a high flexural strength (101.8 MPa) and a good thermal-physical performance.…”

Section: Binary Silicon-based Ceramicsmentioning

confidence: 99%

Organosilicon polymer-derived ceramics: An overview

Zhu

2019

J Adv Ceram

143

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Polymer-derived ceramics (PDCs) strategy shows a great deal of advantages for the fabrication of advanced ceramics. Organosilicon polymers facilitate the shaping process and different silicon-based ceramics with controllable components can be fabricated by modifying organosilicon polymers or adding fillers. It is worth noting that silicate ceramics can also be fabricated from organosilicon polymers by the introduction of active fillers, which could react with the produced silica during pyrolysis. The organosilicon polymer-derived ceramics show many unique properties, which have attracted many attentions in various fields. This review summarizes the typical organosilicon polymers and the processing of organosilicon polymers to fabricate silicon-based ceramics, especially highlights the three-dimensional (3D) printing technique for shaping the organosilicon polymerderived ceramics, which makes the possibility to fabricate silicon-based ceramics with complex structure. More importantly, the recent studies on fabricating typical non-oxide and silicate ceramics derived from organosilicon polymers and their biomedical applications are highlighted.

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“…Therefore, increasing the tensile resistance of quartz fibers performance was of great importance [10][11][12][13]. Meanwhile, the demand for high thermal conductivity materials has been increasing.…”

Section: Introductionmentioning

confidence: 99%

Plasma Electrolysis Spraying Al2O3 Coating onto Quartz Fiber Fabric for Enhanced Thermal Conductivity and Stability

Zhang

Xiang

et al. 2020

Applied Sciences

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This manuscript reported the synthesis of Al2O3 coating onto quartz fiber fabric by plasma electrolysis spray for enhanced thermal conductivity and stability. The nano- and micro-sized clusters were partially observed on the coating, while most coating was relatively smooth. It was suggested that the formation of a ceramic coating was followed as the nucleation-growth raw, that is, the formation of the coating clusters was dependent on the fast grow-up partially, implying the inhomogeneous energy distribution in the electrolysis plasma. The deposition of the Al2O3 coating increased the tensile strength from 19.2 to 58.1 MPa. The thermal conductivity of the coated quartz fiber was measured to be 1.17 W m−1 K−1, increased by ~45% compared to the bare fiber. The formation mechanism of the Al2O3 coating was preliminarily discussed. The thermally conductive quartz fiber with high thermal stability by plasma electrolysis spray will be widely used in flexible thermal shielding and insulation materials.

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Effects of thermal load on mechanical properties and microstructures of 3D SiO2f/Si3N4–BN composites using polyborosilazane

Cited by 16 publications

References 15 publications

Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Organosilicon polymer-derived ceramics: An overview

Plasma Electrolysis Spraying Al2O3 Coating onto Quartz Fiber Fabric for Enhanced Thermal Conductivity and Stability

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