Temperature-dependent fracture strength and the effect of oxidation for ZrB2-SiC ceramics

Wang, Hailong; Chen, Jianyong; Yu, Pengfei; Shen, Shengping

doi:10.1016/j.jeurceramsoc.2017.12.021

Cited by 9 publications

(5 citation statements)

References 41 publications

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“…Ultra‐high temperature materials (UHTMs) including ultra‐high temperature ceramics and their composites, 1,2 graphite materials, 3,4 SiC matrix composites, and carbon/carbon composites, 5‐7 have high strength retentions at high temperatures 8‐10 . Owing to its ultra‐high melting point, large hardness and modulus, good anti‐ablation and excellent particle scour resistance, UHTM is widely used as hot end‐components in aerospace 11‐13 .…”

Section: Introductionmentioning

confidence: 99%

Catalyst‐free in situ synthesis of ZrC nanowires with excellent thermal stability

Yan

et al. 2020

J Am Ceram Soc

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No catalyst‐assisted zirconium carbide nanowires (ZrCNWs) were successfully synthesized by thermal evaporation and in situ reaction using carbon nanotubes (CNTs) and ZrCl4 as carbon and zirconium sources. Vapor‐Solid (VS) mechanism was proposed to explain the growth process of ZrCNWs. The ZrCNWs prepared at 1400°C have a single crystal structure with the diameters of 130‐290 nm. The axial growth direction of ZrCNWs is [111] and the yield is 76.5 wt%. After heat treatment at 1700°C, 2100°C, and 2450°C, the diameter of ZrCNWs increased and their aspect ratio decreased. By simulating the thermal stress of a single ZrCNW, it is speculated that the coarsening and fracture of ZrCNWs are caused by the overall slip of the atomic layers and the stress concentration at the dislocations.

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Section: Introductionmentioning

confidence: 99%

Catalyst‐free in situ synthesis of ZrC nanowires with excellent thermal stability

Yan

et al. 2020

J Am Ceram Soc

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“…Ceramic materials combined with excellent high strength, high modulus, and heat resistance are regarded as the most attractive materials to severe thermal environments. 1 However, their inherent brittleness is a serious obstacle for their wide applications and greatly restricts their reliability in service. 2,3 Then, improving the toughness of the material has become a concern of many scholars.…”

Section: Introductionmentioning

confidence: 99%

On temperature‐dependent interfacial fracture energy/stress intensity factor and matrix cracking in ceramic composites

Gao

Zhang

et al. 2022

Int J Applied Ceramic Tech

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The first matrix cracking stress is a crucial indicator to appraise the mechanical properties of ceramic‐matrix composites, which is the starting point of permanent damage. Based on the classic energy balance method and stress intensity method, two temperature‐dependent first matrix cracking stress models of fiber‐reinforced ceramic matrix composites are established, respectively. The model established by the energy balance method considers the evolution of interfacial fracture energy with temperature, and the model established by the stress intensity method takes into account the evolution of stress intensity factor with temperature. The predictions of the above models in a wide temperature range are verified using experimental data available in the literature, which shows the rationality and accuracy of the above models. Moreover, on the basis of the energy balance method model, the main factors controlling the first matrix cracking stress at different temperatures are analyzed by the numbers. Finally, in view of the analysis results, some suggestions on how to optimize and enhance the first matrix cracking stress at different temperatures are put forward.

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“…Zirconium diboride (ZrB 2 ) is an important member of ultrahigh-temperature ceramics (UHTCs) [1] that has been extensively used as wing leading edges, nose-caps and propulsion system components in space vehicles due to its excellent thermal, mechanical, and chemical properties, such as its high melting point (>3000 • C), high electrical and thermal conductivity, high corrosion resistance, and chemical stability [2][3][4][5][6][7][8][9][10]. Among these properties, thermal shock resistance (TSR) is of vital importance, as most nose-cap, leading edge and aero-engine applications re inevitably subjected to thermal shock, such as the sudden temperature change by high-speed friction with air.…”

Section: Introductionmentioning

confidence: 99%

Repeated Thermal Shock Behavior of ZrB2–SiC–Graphite Composite under Pre-Stress in Air and Ar Atmospheres

et al. 2020

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The thermo–chemo–mechanical coupling on the thermal shock resistance of 20 vol%-ZrB2–15 vol%-SiC–graphite composite is investigated with the use of a self-developed material testing system. In each test, a specimen under prescribed constant tensile pre-stress (σ0 = 0, 10, 20 and 30 MPa) was subjected to 60 cycles of thermal shock. In each cycle, the specimen was heated from room temperature to 2000 °C within 5 s in an air atmosphere or an Ar atmosphere. The residual flexural strength of each specimen was tested, and the fracture morphology was characterized by using scanning electron microscopy (SEM). There were three different regions in the fracture surface of a specimen tested in the air, while no such difference could be observed in the fracture surfaces of the specimens that were tested in Ar. The residual flexural strength of the composite that was tested in Ar generally decreases with the increase of σ0. However, in the range of 0 ≤ σ0 ≤ 10 MPa, the residual flexural strength of the composite that was tested in the air ascended with the increase of σ0 due to the healing effect of oxidation, but it descended thereafter with a further increase of σ0, as the effect pre-stress that became prominent.

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Temperature-dependent fracture strength and the effect of oxidation for ZrB2-SiC ceramics

Cited by 9 publications

References 41 publications

Catalyst‐free in situ synthesis of ZrC nanowires with excellent thermal stability

Catalyst‐free in situ synthesis of ZrC nanowires with excellent thermal stability

On temperature‐dependent interfacial fracture energy/stress intensity factor and matrix cracking in ceramic composites

Repeated Thermal Shock Behavior of ZrB2–SiC–Graphite Composite under Pre-Stress in Air and Ar Atmospheres

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