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TY  - THES
AU  - Lynen, Leonhard
TI  - Wirkmechanismus des Kryoliths als aktiver Füllstoff in Schleifmitteln auf Unterlage
PB  - Rheinisch-Westfälische Technische Hochschule Aachen
VL  - Dissertation
CY  - Aachen
M1  - RWTH-2025-02997
SP  - 1 Online-Ressource : Illustrationen
PY  - 2024
N1  - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2025
N1  - Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024
AB  - Fillers are used to enhance the performance of grinding tools. The exact mechanism of those fillers is not proven, but there are a lot of theories on the mechanism of action. Cryolite is one of these fillers, which is often used in coated abrasives. Unfortunately, cryolite is hazardous to water and can cause health problems when inhaled. Therefore, there are exposition limits for working spaces. Additionally, cryolite-containing wastes are to be disposed of as hazardous waste. These reasons led to the aim to substitute cryolite. This is only possible with a good understanding of the cryolite's mechanism of work. Therefore, this thesis aims for a better understanding of this mechanism. Grinding experiments with coated abrasives containing either cryolite or chalk as a reference were carried out using a pin-on-disk tribometer. Some experiments were carried out with pins containing a glass-fibre to enable a temperature measurement using a pyrometer. The amount of transferred metal on the abrasives after grinding was measured via ICP. The impact of the grinding-interval-length and the steel that was worked, was examined. Experiments were carried out with austenitic stainless-steel 1.4301, machining-steel 1.0715, and construction-steel 1.0037. The experiment shows that the presence of cryolite in the abrasive lowers the grinding energy for austenitic stainless-steel. In comparison, cryolite shows no such effect on the machining steels. Additionally, the cryolite lowers the amount of transferred metal by a significant amount when grinding the austenitic stainless-steel. Depending on the used steel and the grinding-interval-length, cryolite reduces the amount of build-up-edge by 21 
LB  - PUB:(DE-HGF)11
DO  - DOI:10.18154/RWTH-2025-02997
UR  - https://publications.rwth-aachen.de/record/1008380
ER  -