Micro-Radiography and Tomography for High Resolution NDT of Advanced Materials and Microstructural Components

1990 ◽  
Vol 112 (2) ◽  
pp. 223-226 ◽  
Author(s):  
M. Maisl ◽  
H. Reiter ◽  
P. Ho¨ller
Keyword(s):  
High Resolution ◽  
Cross Sections ◽  
High Strength ◽  
Advanced Materials ◽  
Reinforced Composites ◽  
High Resolution Computed Tomography ◽  
Linear Dimensions ◽  
Order Of Magnitude ◽  
Fibre Reinforced Composites

Quality assessment of advanced materials like high strength ceramics and fibre reinforced composites requires detection and characterization of early damage and defects like cracks and pores even with linear dimensions of only 10 μm. Structures of the same size must be distinguishable in components of precision mechanics and electronics. This paper discusses some applications of microfocal X-ray radiography and high resolution computed tomography in nondestructive evaluation of such components. The latter can be looked at as a nondestructive microscopic technique imaging cross sections of an object. Results of investigations using a tomographic unit with a resolution capability of the order of magnitude of 20 μm are presented.

Hemp Fibre Reinforced Composites

2017 ◽  
Author(s):  
Ivana Schwarzova ◽  
Nadezda Stevulova ◽  
Tomas Melichar
Keyword(s):  
Physical And Mechanical Properties ◽  
High Strength ◽  
Sustainable Construction ◽  
Component Part ◽  
Reinforced Composites ◽  
Hemp Fibre ◽  
And Performance ◽  
Water Absorbability ◽  
Industrial Hemp ◽  
Fibre Reinforced Composites

The conventional homogeneous materials can no longer effectively satisfy the growing demands on product capabilities and performance, due to the advancement in products design and materials engineering. Therefore, the fibre reinforced composites with better properties and desirable applications emerged. Natural fibres have high strength to low weight ratios and have good sound and thermal insulation properties. Combination of organic filler and inorganic matrix creates high-quality products such as fibre boards and composites. The great importance is attached to industrial hemp as source of the rapidly renewable fibres and as non-waste material. Industrial hemp fibre has great potential in composite materials reinforcement. However, improving interfacial bonding between fibres and matrix is an important factor for its using in composites. This paper deals with hemp fibre reinforced composites in civil engineering as component part of sustainable construction. Prepared lightweight composites based on original and pre-treated hemp hurds are characterized by selected physical and mechanical properties (density, thermal conductivity, water absorbability, compressive and tensile strength) in dependence on used inorganic binder (traditional Portland cement and alternative MgO-cement).

Mechanical Characterization Of Unidirectional Carbon And Glass/Epoxy Reinforced Composites For High Strength Applications

2017 ◽  
Vol 4 (2) ◽  
pp. 3166-3172 ◽  
Author(s):  
C. Venkateshwar Reddy ◽  
P. Ramesh Babu ◽  
R. Ramnarayanan ◽  
Dilkeshwar Das
Keyword(s):  
Mechanical Characterization ◽  
High Strength ◽  
Reinforced Composites

scholarly journals Graphene-Coated Sensor Yarn for Composite Preforms

Proceedings ◽  
2020 ◽  
Vol 32 (1) ◽  
pp. 21
Author(s):  
Fernando ◽  
Ali ◽  
Tan ◽  
He
Keyword(s):  
High Strength ◽  
Textile Fibre ◽  
Reinforced Composites ◽  
Low Weight ◽  
Strength And Stiffness ◽  
Fibre Reinforced Composites

There is extensive research to demonstrate that textile fibre reinforced composites can produce high strength and stiffness at a low weight allowing them to become excellent candidates for applications requiring improved strength and lighter structures compared to their metallic counterparts. [...]

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