Numerical optimization for the geometrical configuration of ceramics perform in ZTAP/HCCI wear resistant composites based on actual particle model

2021 ◽  
Author(s):  
Ruiju Xu ◽  
Tianlong Lu ◽  
Jiankang Zhang ◽  
Yehua Jiang ◽  
Xiaoyu Chong ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Solidification Process ◽  
Ceramic Particle ◽  
Particle Model ◽  
Matrix Composites ◽  
Geometrical Configuration ◽  
Ceramic Particles ◽  
High Chromium Cast Iron ◽  
Element Simulation ◽  
Chromium Cast Iron

Abstract In order to reduce the thermal stress in high chromium cast iron (HCCI) matrix composites reinforced by zirconia toughened alumina (ZTA) ceramic particles, finite element simulation is performed to optimize the geometrical configuration of ceramics perform. The previous model simplifies the overall structure of the ceramic particle preform and adds boundary conditions to simulate the particles, which will cause uncontrollable error in the results. In this work, the equivalent grain models are used to describe the actual preform, making the simulation results closer to the actual experimental results. The solidification process of composite material is simulated and the infiltration between molten iron and ceramic particles was realized. Thermal stress in solidification process and compression stress distribution are obtained. The results show that adding 10mm round holes on the preform can improve the performance of the composite, which is helpful to prevent the cracks and increases the plasticity of the material.

scholarly journals Numerical Optimization for the Geometric Configuration of Ceramics Perform in HCCI/ZTAP Wear-Resistant Composites Based on Actual Particle Model

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Ruiju Xu ◽  
Tianlong Lu ◽  
Jiankang Zhang ◽  
Yehua Jiang ◽  
Xiaoyu Chong ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Solidification Process ◽  
Ceramic Particle ◽  
Geometric Configuration ◽  
Particle Model ◽  
Matrix Composites ◽  
Ceramic Particles ◽  
High Chromium Cast Iron ◽  
Element Simulation ◽  
Chromium Cast Iron

AbstractIn order to reduce the thermal stress in high chromium cast iron (HCCI) matrix composites reinforced by zirconia toughened alumina (ZTA) ceramic particles, finite element simulation is performed to optimize the geometric configuration of ceramics perform. The previous model simplifies the overall structure of the ceramic particle preform and adds boundary conditions to simulate the particles, which will cause uncontrollable error in the results. In this work, the equivalent grain models are used to describe the actual preform, making the simulation results closer to the actual experimental results. The solidification process of composite material is simulated, and the infiltration between molten iron and ceramic particles is realized. Thermal stress in solidification process and compression stress distribution are obtained. The results show that adding 10-mm round holes on the preform can improve the performance of the composite, which is helpful to prevent the cracks and increases the plasticity of the material.

scholarly journals Interface transition layer interaction mechanism for ZTAP/HCCI composites

2018 ◽  
Vol 25 (5) ◽  
pp. 881-890 ◽  
Author(s):  
MoJin Zhou ◽  
YeHua Jiang ◽  
XiaoYu Chong
Keyword(s):  
Transition Layer ◽  
Interaction Mechanism ◽  
Matrix Composites ◽  
Ceramic Particles ◽  
High Chromium Cast Iron ◽  
Transmission Electron ◽  
Metallurgical Bonding ◽  
The Matrix ◽  
Three Body ◽  
Chromium Cast Iron

AbstractZrO2-toughened Al2O3 (ZTA, 40%) ceramic particles reinforced by high chromium cast iron (HCCI) matrix composites were fabricated by casting infiltration. The interaction between the ZTA ceramic particles and the matrix by the interface transition layer (ITL) was investigated. From the perspective of interfacial bonding, the ceramic particles and HCCI experienced metallurgical bonding by the ITL. Electron probe microanalysis results demonstrated that Cr, Fe, and Mn diffused from the matrix to the ITL. Transmission electron microscopy revealed that the main phases in the transition layer were glassy. The wear resistance of the composites with the transition layer was better than those without, as indicated by the three-body abrasive wear tester.

Influence of ceramic particle features on the thermal behavior of PPO-matrix composites

2014 ◽  
Vol 21 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Mariangela Lombardi ◽  
Paolo Fino ◽  
Laura Montanaro
Keyword(s):  
Thermal Behavior ◽  
Organic Matrix ◽  
Ceramic Particle ◽  
Homogeneous Distribution ◽  
Matrix Composites ◽  
Ceramic Particles ◽  
Inorganic Particles ◽  
Combustion Behavior ◽  
Blending Method ◽  
The Matrix

AbstractThermoplastic poly(phenylene oxide) (PPO)-matrix composites were prepared and characterized in order to evaluate the effect of different ceramic fillers on the thermal and combustion behavior of the matrix. In particular, ceramic particles having three different shapes were exploited as fillers, particles showing a platelet-like, a needle-like or an equiaxial morphology. The composite materials were produced through a melt blending method, which yielded a homogeneous distribution of the ceramic particles in the organic matrix. It was demonstrated that the presence of the inorganic particles influenced the temperature range in which the degradation processes of the polymer occurred. In addition, the three fillers modified the thermal behavior of PPO differently in terms of enthalpy. Finally, the presence of the filler induced a change in combustion behavior of the polymeric matrix; in particular, sepiolite was able to increase the charring ability of the PPO/polystyrene blend with the development of a visible carbonaceous layer.

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