In this paper, micromechanical constitutive models are developed to predict the tensile and fatigue behavior of fiber-reinforced ceramic-matrix composites (CMCs) considering matrix fragmentation closure. Damage fragmentation, interface debonding, fiber’s failure considered in analysis response, closure, debonding repeated sliding hysteresis response. Relationships between established. Experimen...

Adapting conventional sintering (CS) techniques of monolithic ceramics for the production oxide ceramic matrix composites (Ox-CMCs) comes along with a few drawbacks, such as fiber degradation. Thus, applicability two-step (TSS) Ox-CMCs based on Nextel™ 610 fibers and porous alumina is investigated in this study first time. Uniaxial tensile tests were performed to evaluate performance mini-compo...

Ceramic matrix composites made of silicon carbide fibers embedded in (SiC/SiC CMCs) are widely recognized as excellent replacements for denser superalloys such Nickel based super alloys high-temperature applications aero engines. During the manufacturing process with chemical vapour infiltration, large amount pores introduced CMC and their presence can have considerable impact on structural per...

In order to further develop and understand the data provided by electrical resistance measurements, three ceramic matrix composites (CMCs) were characterized in tension. The observed changes of compared acoustic emission spectra, another commonly used damage monitoring method, as well classical interposed unloading/reloading cycles. A model was then proposed predict evolution a function state c...

In this paper, the synergistic effects of stress rupture and cyclic loading on the strain response of fiber-reinforced ceramic-matrix composites (CMCs) at elevated temperature in air have been investigated. The stress-strain relationships considering interface wear and interface oxidation in the interface debonded region under stress rupture and cyclic loading have been developed to establish t...

The increasing demand for more efficient and environmental-friendly gas turbines has driven the development of new strategies material development. SiC/SiC ceramic matrix composites (CMCs) can fulfil stringent requirements; however, they require protection from operating environment debris ingested during operation. Environmental barrier coatings (EBCs) are a protective measure to enable CMCs o...

The reusability of CMCs with inherently high-temperature capabilities and ablation resistance goes through understanding the effects residual thermal stresses (RTS) caused by expansion mismatch between fibre matrix. In this work, RTS ultra-high temperature ZrB2–SiC based ceramic reinforced carbon fibres was dependent on anisotropy coating. A detailed microstructural analysis about state matrix ...

The development of aircraft gas turbine engines has extensively been required for the advanced materials. This complex process is however justified by system-level benefits in terms reduced weight, higher temperature capability, and/or cooling, each which increases efficiency. where high-temperature ceramics have made considerable progress and ceramic matrix composites (CMCs) are foreground. CM...

Improvement of the thermal stability continuous SiC fiber reinforced ceramic matrix composites (SiCf/SiC CMC) by pre-treatment fillers and suppression oxidation during polymer impregnation pyrolysis (PIP) process were investigated. Dense SiCf/SiC CMCs fabricated using slurry infiltration PIP under a purified argon atmosphere. Structure mechanical properties CMC heated at different temperatures ...

High modulus of about 1 TPa, high thermal conductivity over 3000 W/mK, very low coefficient expansion (CTE), electrical conductivity, self-lubricating characteristics and density have made CNTs one the best reinforcing materials nano composites for advanced structural, industrial, strength wear-prone applications. This is so because it has capacity improving mechanical, tribological, electrical...