Sub-micron wear measurement using activities under the free handling limit

Ditrói, F.; Takács, S.; Tárkányi, F.; Corniani, Enrico; Smith, Richard W.; Jech, Martin; Wopelka, Thomas

doi:10.1007/s10967-012-1625-1

Cited by 11 publications

(8 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bombarding energy of the activating charged particles and Figure 2 Test setup showing the tribometer with the mounted samples, the RIC detector unit and the pump for the oil circuit the irradiation angle were selected in such a way that the depth distribution of the produced main isotope (Table III) corresponds to the expected wear range of the part/material in question. The irradiation dose was designed in such a way that the total activity of the sample (s) sent in a single package and/ or used in a measurement do not exceed the free handling limit (Ditr oi et al, 2012). The samples were measured after the irradiation with high-resolution gamma-spectrometer to certify the activity of the main and the co-produced radio-isotopes.…”

Section: Wear Measurement 231 Wear Measurementradio Isotope Concentration Methodsmentioning

confidence: 99%

Wear of different material pairings for the cylinder liner – piston ring contact

Wopelka

Cihak-Bayr

Lenauer

et al. 2018

ILT

View full text Add to dashboard Cite

Purpose-This paper aims to investigate the wear behaviour of different materials for cylinder liners and piston rings in a linear reciprocating tribometer with special focus on the wear of the cylinder liner in the boundary lubrication regime. Design/methodology/approach-Conventional nitrided steel, as well as diamond-like carbon and chromium nitride-coated piston rings, were tested against cast iron, AlSi and Fe-coated AlSi cylinder liners. The experiments were carried out with samples produced from original engine parts to have the original surface topography available. Radioactive tracer isotopes were used to measure cylinder liner wear continuously, enabling separation of running-in and steady-state wear. Findings-A ranking of the material pairings with respect to wear behaviour of the cylinder liner was found. Post-test inspection of the cylinder samples by scanning electron microscopy (SEM) revealed differences in the wear mechanisms for the different material combinations. The results show that the running-in and steady-state wear of the liners can be reduced by choosing the appropriate material for the piston ring. Originality/value-The use of original engine parts in a closely controlled tribometer environment under realistic loading conditions, in conjunction with continuous and highly sensitive wear measurement methods and a detailed SEM analysis of the wear mechanisms, forms an intermediate step between engine testing and laboratory environment testing.

show abstract

Section: Wear Measurement 231 Wear Measurementradio Isotope Concentration Methodsmentioning

confidence: 99%

Wear of different material pairings for the cylinder liner – piston ring contact

Wopelka

Cihak-Bayr

Lenauer

et al. 2018

ILT

View full text Add to dashboard Cite

show abstract

“…The most interesting application of radioisotopes in tracer technology is TLA (Thin Layer Activation) [27,28]. With 106m Ag it is possible to perform TLA investigations to measure wear, corrosion or erosion rate of parts containing silver, within a period of about one month.…”

Section: Industrial Applicationsmentioning

confidence: 99%

“…A longer irradiation also provides higher activity but the irradiation time vs. activity function is not a linear one. The produced total activity should be below the FHL (Free Handling Limit =1000 kBq for 106m Ag) [28] level, if the industrial laboratory or site has no license to handle and store radioactive materials, which is the case according to Table 4. For a licensed laboratory higher activity can be produced (with additional transport problems).…”

Section: Industrial Applicationsmentioning

confidence: 99%

Investigation of alpha particle induced reactions on natural silver in the 40–50 MeV energy range

Ditrói

Takács

Haba

et al. 2018

Nuclear Instruments and Methods in Physics Research Section B:

Self Cite

View full text Add to dashboard Cite

Natural silver targets have been irradiated by using a 50 MeV alpha-particle beam in order to measure the activation cross sections of radioisotopes in the 40-50 MeV energy range. Among the radio-products there are medically important isotopes such as 110m In and 111 In. For optimizing the production of these radioisotopes and regarding their purity and specific activity the cross section data for every produced radioisotope are important. New data are measured in this energy range and the results of some previous measurements have been confirmed. Physical yield curves have been calculated by using the new cross section data completed with the results from the literature.

show abstract

“…Some of the produced isotopes are suitable also for application in radioisotope tracing i.e. for wear measurement with Thin Layer Activation (TLA) (Ditrói et al, 1997;Ditrói et al, 2012). The 110m Ag (T1/2 = 249.83 d) has conveniently long half-life and properly strong gamma-energies as well as it can be produced even with small compact cyclotrons or other low energy accelerators.…”

Section: Thin Layer Activationmentioning

confidence: 99%

Activation cross sections of deuteron induced reactions on silver in the 33–50 MeV energy range

Ditrói

Tárkányi

Takács

et al. 2017

Applied Radiation and Isotopes

Self Cite

View full text Add to dashboard Cite

Sub-micron wear measurement using activities under the free handling limit

Cited by 11 publications

References 14 publications

Wear of different material pairings for the cylinder liner – piston ring contact

Wear of different material pairings for the cylinder liner – piston ring contact

Investigation of alpha particle induced reactions on natural silver in the 40–50 MeV energy range

Activation cross sections of deuteron induced reactions on silver in the 33–50 MeV energy range

Contact Info

Product

Resources

About

Sub-micron wear measurement using activities under the free handling limit

Cited by 11 publications

References 14 publications

Wear of different material pairings for the cylinder liner – piston ring contact

Wear of different material pairings for the cylinder liner – piston ring contact

Investigation of alpha particle induced reactions on natural silver in the 40–50 MeV energy range

Activation cross sections of deuteron induced reactions on silver in the 33–50 MeV energy range

Contact Info

Product

Resources

About

Investigation of alpha particle induced reactions on natural silver in the 40–50 MeV energy range