Prompt Gamma Activation Analysis of Impurity and Elemental Stability for Two SU-8 Organic Polymer Samples Having Different Solidification Pretreatment

Heaton, Mark; Rogante, M.; Kasztovszky, Zs.; Denieffe, David

doi:10.2174/1874098700903010033

Cited by 5 publications

(3 citation statements)

References 6 publications

(11 reference statements)

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“…The high percentages of the elements H and O are also assumed to rise and fall with exposure to humidity over a period of days. The mentioned similarity indicates that the investigated samples are of a very consistent and pure composition as crucial for producing the stable microturbine performs, as shown in figure 1(a) [26]. This experiment has also shown the industrial applicability of the PGAA technique in the considered industrial sector.…”

Section: Prompt Gamma Investigation On the Polymer Specimenssupporting

confidence: 64%

Neutron beam measurement of industrial polymer materials for composition and bulk integrity

Rogante

Rosta

Heaton

2013

Meas. Sci. Technol.

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Neutron beam techniques, among other non-destructive diagnostics, are particularly irreplaceable in the complete analysis of industrial materials and components when supplying fundamental information. In this paper, nanoscale small-angle neutron scattering analysis and prompt gamma activation analysis for the characterization of industrial polymers are considered. The basic theoretical aspects are briefly introduced and some applications are presented. The investigations of the SU-8 polymer in axial airflow microturbines—i.e. microelectromechanical systems—are presented foremost. Also presented are full and feasibility studies on polyurethanes, composites based on cross-linked polymers reinforced by carbon fibres and polymer cement concrete. The obtained results have provided a substantial contribution to the improvement of the considered materials, and indeed confirmed the industrial applicability of the adopted techniques in the analysis of polymers.

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Section: Prompt Gamma Investigation On the Polymer Specimenssupporting

confidence: 64%

Neutron beam measurement of industrial polymer materials for composition and bulk integrity

Rogante

Rosta

Heaton

2013

Meas. Sci. Technol.

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“…The samples B8 and B9 show a defect size increasing with the increasing of the PEB time, the maximum average defect size is 412 A ˚, that is 50 A ˚less than the breaking defect size of sample A5. This investigation partners well with another neutron technique, prompt gamma activation analysis, which was also used successfully on the microturbines to check elemental composition stability under various material processing conditions (Heaton et al, 2009). Knowing qualitative data about the samples can aid the analysis of the SANS results.…”

Section: Investigation Of Processing Effectsmentioning

confidence: 60%

Investigation of the processing effects of UV, heat and laser ablation on SU‐8 microturbines

Heaton

Rogante

Len

et al. 2010

Multidiscipline Modeling in Materials and Structures

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Purpose -The purpose of this paper is to determine the nano-sized characteristics of SU-8 polymer micro-electromechanical systems airflow metrology turbines samples. These microturbines were made to be the first using axial airflow for low air pressure response. This polymer may be affected during curing by UV and heat baking, as well as confined heat from laser ablation. Defects in the resin matrix may influence the material quality and hence the final turbine performance. Design/methodology/approach -Small angle neutron scattering investigations were performed using the instrumentation of the Budapest Research Reactor. Findings -The average sizes of the voids/cracks in the resin matrix of the turbines were determined and allowed the viability of making smaller even thinner rotor blades for higher spin and electrical output capability to be considered. Originality/value -The obtained results have advanced the industrial applicability of the adopted technique in the considered sector of polymer analysis.

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“…PGAA is based on the detection of characteristic prompt gamma photons that originate in (n,γ) nuclear reactions. The principles of this method have been well known for decades, nevertheless industrial applications are presently in development (see, e.g., [19,20]). Every atomic nucleus, apart from 4 He, may undergo a (n,γ) reaction with different probabilities.…”

Section: Neutron Beam Techniques Applicable For This Investigationmentioning

confidence: 99%

Feasibility Study for a Neutron-Based Investigation of Polymer Cement Concretes

Rogante¹,

Domanskaya²,

Gerasimova³

et al. 2013

ujas

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Study of dense cements, ceramics and related materials such as cement stones, is significant to create novel advanced components for various types of buildings and structures. These materials can possess high functional properties and they can be adopted for various purposes, for instance as corrosion resistive coatings for cement constructions. In this paper, the investigability of polymer cement concretes by neutron beam techniques (NBT) and, in particular, the nano-scale characterization by small angle neutron scattering (SANS) of polymer cement concrete (PCC) samples made of Portland or aluminous cement with added γAl 2 O 3 and redispersible dry polymer, are discussed. The main aims are to assess key parameters (e.g., porosity, fractal dimensions, size distribution, presence of cracks or open and closed pores) responsible of the materials' performance at the scale from 1 Å to 100 Å, as well as to expand the possibility of applications. NBT, among the other non-destructive diagnostics, are particularly unique in the complete analysis of industrial materials when supplying essential information. The results obtained by means of a neutron-based investigation can translate into the optimization of consistency and the design of operating conditions and procedures that support and enhance quality and safety levels. Various examples concerning the examinations of different kinds of cements are reported. This state-of-the-art stage indeed confirms the industrial applicability of NBT in completing the characterization of the considered materials.

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Prompt Gamma Activation Analysis of Impurity and Elemental Stability for Two SU-8 Organic Polymer Samples Having Different Solidification Pretreatment

Cited by 5 publications

References 6 publications

Neutron beam measurement of industrial polymer materials for composition and bulk integrity

Neutron beam measurement of industrial polymer materials for composition and bulk integrity

Investigation of the processing effects of UV, heat and laser ablation on SU‐8 microturbines

Feasibility Study for a Neutron-Based Investigation of Polymer Cement Concretes

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