Evaluation of Heat Conducting Properties of Lead Smelting Granulated Slag and the Slag-Cement Composite Materials at High Temperatures.

The paper deals with the development of composite binders for producing concrete with improved characteristics of gas, water and vapor permeability. The authors investigate the processes of composite materials formation in order of decreasing scale levels from macro to nanostructures. The criteria for optimization of the volume of dispersed additives in concrete are offered. The authors theoretically studied the technological features of the formation of hydrated cement stone structure. A positive effect of nanodispersed additives on the structure and physico-mechanical properties of cement composite materials are predicted. Thanks to its improved features, such as good ratio of strength and body density, high density and lifetime, the modified concrete may be used when solving various practical tasks of the construction branch.

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Bearing capacity of a threaded pair made of spatially reinforced carbon-carbon composite materials at high temperatures

10.36652/0042-4633-2021-6-30-34 ◽

2021 ◽

pp. 30-34

Author(s):

Keyword(s):

Composite Materials ◽

Bearing Capacity ◽

High Temperatures ◽

Limit Load ◽

Carbon Composite ◽

Reinforcement Scheme ◽

Carbon Composite Material ◽

Carbon Composite Materials ◽

Threaded Joints ◽

Joint Limit

The bearing capacity of a threaded pair made of spatially reinforced carbon-carbon composite materials (CCCM) with a 4DL reinforcement scheme in the temperature range from 20 to 2500 °C is experimentally determined. Recommendations are given for the design of CCCM threaded joints for operation at high temperatures. Keywords: carbon-carbon composite material, threaded joint, limit load, bearing capacity, threaded pair, high temperature. [email protected]

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Mesoscale computational modeling of the mechanical behavior of cement composite materials

Composite Structures ◽

10.1016/j.compstruct.2020.113137 ◽

2021 ◽

Vol 257 ◽

pp. 113137

Author(s):

Marcello Congro ◽

Deane Roehl ◽

Cristian Mejia

Keyword(s):

Composite Materials ◽

Computational Modeling ◽

Mechanical Behavior ◽

Cement Composite

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Design of Heat-Conductive hBN–PMMA Composites by Electrostatic Nano-Assembly

Nanomaterials ◽

10.3390/nano10010134 ◽

2020 ◽

Vol 10 (1) ◽

pp. 134 ◽

Cited By ~ 4

Author(s):

Atsushi Yokoi ◽

Wai Kian Tan ◽

Taichi Kuroda ◽

Go Kawamura ◽

Atsunori Matsuda ◽

...

Keyword(s):

Composite Materials ◽

Hexagonal Boron Nitride ◽

Functional Materials ◽

Polymeric Materials ◽

Material Design ◽

Heat Conducting ◽

Matrix Composites ◽

Assembly Method ◽

Functional Additives ◽

Energy Consuming

Micro/nanoscale design of composite materials enables alteration of their properties for advanced functional materials. One of the biggest challenges in material design is the controlled decoration of composite materials with the desired functional additives. This study reports on and demonstrates the homogeneous decoration of hexagonal boron nitride (hBN) on poly(methylmethacrylate) (PMMA) and vice versa. The formation of the composite materials was conducted via a low environmental load and a low-energy-consuming, electrostatic nano-assembly method which also enabled the efficient usage of nano-sized additives. The hBN/PMMA and PMMA/hBN composites were fabricated in various size combinations that exhibited percolated and layer-oriented structures, respectively. The thermal conductivity behaviors of hBN/PMMA and PMMA/hBN composites that exhibited good microstructure were compared. The results showed that microstructural design of the composites enabled the modification of their heat-conducting property. This novel work demonstrated the feasibility of fabricating heat-conductive PMMA matrix composites with controlled decoration of hBN sheets, which may provide a platform for further development of heat-conductive polymeric materials.

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