Tensile fracture behavior and strength distribution of SiCf/SiC composites with different SiBN interface thicknesses

Liu, Yongsheng; Chai, Nan; Qin, Hailong; Li, Zan; Ye, Fang; Cheng, Laifei

doi:10.1016/j.ceramint.2014.09.098

Cited by 24 publications

(7 citation statements)

References 17 publications

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“…It shows that the bonding types are the same at various SiCl 4 flow rates. There are three main types of bonding in SiBN coating—namely Si-N, B-N, and N-O—which are consistent with our previous work about the effect of deposition temperature on the deposition [13]. However, the content of them varies at various SiCl 4 flow rates, as shown in Table 3.…”

Section: Resultssupporting

confidence: 86%

“…The amorphous SiBN can be deposited using SiCl 4 -BCl 3 -NH 3 -H 2 -Ar mixture. The effect of temperature on SiBN deposition and the relationship between SiBN interphase and composites’ mechanical properties have been discussed in our previous work [11,12,13,14]. So far, the flow of reactants, an important factor influencing the deposition, has been rarely reported.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the SiCl4 Flow Rate on SiBN Deposition Kinetics in SiCl4-BCl3-NH3-H2-Ar Environment

Qin

Liu

et al. 2017

Materials

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To improve the thermal and mechanical stability of SiCf/SiC or C/SiC composites with SiBN interphase, SiBN coating was deposited by low pressure chemical vapor deposition (LPCVD) using SiCl4-BCl3-NH3-H2-Ar gas system. The effect of the SiCl4 flow rate on deposition kinetics was investigated. Results show that deposition rate increases at first and then decreases with the increase of the SiCl4 flow rate. The surface of the coating is a uniform cauliflower-like structure at the SiCl4 flow rate of 10 mL/min and 20 mL/min. The surface is covered with small spherical particles when the flow rate is 30 mL/min. The coatings deposited at various SiCl4 flow rates are all X-ray amorphous and contain Si, B, N, and O elements. The main bonding states are B-N, Si-N, and N-O. B element and B-N bonding decrease with the increase of SiCl4 flow rate, while Si element and Si-N bonding increase. The main deposition mechanism refers to two parallel reactions of BCl3+NH3 and SiCl4+NH3. The deposition process is mainly controlled by the reaction of BCl3+NH3.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Effect of the SiCl4 Flow Rate on SiBN Deposition Kinetics in SiCl4-BCl3-NH3-H2-Ar Environment

Qin

Liu

et al. 2017

Materials

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“…Figure 9 illustrated the stress-strain plots and corresponding damage in some selected points of SiC f /SiC composites with h-BN interphase, including the previous experimental ones for comparison. 45,46 Unlike XFEM, which can only reproduce linear constitutive of SiC f /SiC composites, 20,44,47 the pseudo-ductility brought from the relative strength of fiber, interphase, and matrix is well reproduced in the present work, indicating that the PF method is more suitable than XFEM for simulating crack propagation in SiC f /SiC composites with h-BN interphase. With increasing the strain, these plots can be divided into four stages:…”

Section: Single-fiber Rve Longitudinal Tension Along the Fibermentioning

confidence: 72%

“…(A) Strain–stress response of unidirectional SiC f /SiC composites with h‐BN interphase stretch along the fiber direction, damage evolution, and SEM image obtained from tensile of SiC f /SiC composites using standard ASTM D 3379‐75, 45 and (B) reconstructed image from synchrotron x‐ray computed micro‐tomography 46 …”

Section: Resultsmentioning

confidence: 99%

Phase‐field simulation of microscale crack propagation/deflection in SiC_f/SiC composites with weak interphase

et al. 2023

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To understand the microscale toughening mechanism, the crack propagation, and stress–strain response of unidirectional SiCf/SiC composites with h‐BN interphase under transverse and longitudinal tension are investigated by a promising micromechanical phase field (PF) method along with representative volume element. Of much interest, the calculation results are well consistent with the available experimental results. With a strong dependence on the interphase strength, the toughening mechanisms during crack propagation are well presented, for example, fiber pull‐out, crack deflection, and interphase debonding. Furthermore, the longitudinal tensile strength of SiCf/SiC composites increases with decreasing the interphase strength, where only a weak enough interphase can result in a significant crack deflection by its cracking. In particular, the ratio of the interphase strength along fibers to the matrix strength should be less than 1.254 to ensure crack deflection in the interphase and fiber pull‐out. Moreover, the transverse tensile strength of SiCf/SiC composites reaches a maximum with increasing the interphase thickness into the range of 0.25–0.5 µm.

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“…SiC having continuous network structure are a very promising ceramic material for use in semiconductor processing, nuclear fusion reactors, heat-sink plates, and high temperature thermo-mechanical applications because of their excellent chemical and thermal stability, high thermal conductivity, and good mechanical properties [4]. However, a problem of Al/SiC composites is that the microstructure shows a nonuniform distribution of SiC particles [5]. Al-B 4 C composites have a potential to be used as armor materials in body protection, helicopters, military aircrafts and vehicles where lightweight is of utmost importance [6].…”

Section: Introductionmentioning

confidence: 99%

PRODUCTION AND PROPERTIES OF AL2024-2 WT.% (SiC-B4C) HYBRID NANOCOMPOSITE

Karabacak¹,

Çanakçı²,

Özkaya³

et al. 2018

NWSA

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In this paper, production and properties of Al2024-SiC-B 4 C hybrid nanocomposite produced using mechanical alloying and hot pressing by powder metallurgy method. First of all, Al2024, SiC and B 4 C powders were alloyed in planetary ball mill at room temperature with 8 hours to be obtained homogeneous powder distribution. After, the hot pressing technique was used for producing hybrid nanocomposite with 2 weight percentage (1 wt.% SiC and 1 wt.% B 4 C respectively) of SiC and B 4 C reinforcements. The mechanical (hardness, tensile strength, bending strength, fracture surface), physical (density, porosity) of properties and microstructure of Al2024-SiC-B 4 C hybrid nanocomposite were investigated. It was showed that the uniform distribution of dispersion of SiC-B 4 C nano particles within Al2024 matrix.

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Tensile fracture behavior and strength distribution of SiCf/SiC composites with different SiBN interface thicknesses

Cited by 24 publications

References 17 publications

Effect of the SiCl4 Flow Rate on SiBN Deposition Kinetics in SiCl4-BCl3-NH3-H2-Ar Environment

Effect of the SiCl4 Flow Rate on SiBN Deposition Kinetics in SiCl4-BCl3-NH3-H2-Ar Environment

Phase‐field simulation of microscale crack propagation/deflection in SiC_f/SiC composites with weak interphase

PRODUCTION AND PROPERTIES OF AL2024-2 WT.% (SiC-B4C) HYBRID NANOCOMPOSITE

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Tensile fracture behavior and strength distribution of SiCf/SiC composites with different SiBN interface thicknesses

Cited by 24 publications

References 17 publications

Effect of the SiCl4 Flow Rate on SiBN Deposition Kinetics in SiCl4-BCl3-NH3-H2-Ar Environment

Effect of the SiCl4 Flow Rate on SiBN Deposition Kinetics in SiCl4-BCl3-NH3-H2-Ar Environment

Phase‐field simulation of microscale crack propagation/deflection in SiCf/SiC composites with weak interphase

PRODUCTION AND PROPERTIES OF AL2024-2 WT.% (SiC-B4C) HYBRID NANOCOMPOSITE

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Product

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Phase‐field simulation of microscale crack propagation/deflection in SiC_f/SiC composites with weak interphase