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Un point de départ pour la mise en route des lubrifiants « neutre à l'environnement » ont été les huiles perdues et les fuites accidentelles, les lubrifiants perdus ...

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First of all, I would like to express my sincere thanks to my supervisor Dr.-Ing. Mathias Woydt, head of the aforementioned working group, who gave me the ...

DepositOnce: Slip-rolling resistance of novel Zr(C,N) thin film...

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Author: Charles-Alix Manier. URN: urn:nbn:de:kobv:83-opus Advisor: Dr.-Ing. Mathias Woydt. Document Type: Doctoral Thesis.

OPUS 4 | Adjusting the functional properties of niobium carbide

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Mathias Woydt The process window and range of functional properties of NbC is wide, because micro-hardness, hot hardness, sliding wear resistance, elastic modulus and toughness can be tailored by the C/Nb ratio, because Nb4C3, Nb6C5 and other short and long range ordered phases occur in the region of homogeneity of NbCx (0,75≤ x ≤1.0) …

OPUS 4 | The identification in engine or gear tests of the induction...

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Mathias Woydt. In the state-of-the-art technology, the impact of additives on friction and wear is evaluated in recipes with fixed concentrations.

OPUS 4 | Application oriented tribological test concepts

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The tribotesting categories have different scopes with associated

OPUS 4 | Generation of defined tribofilms and their stability under...

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Tribofilms formed by additives in lubricants represent a key mechanism for preventing wear, but are difficult to investigate due to the complexity of the...

OPUS 4 | Substituting tungsten carbide (WC) as cutting tools and for...

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Substituting tungsten carbide (WC) as cutting tools and for wear protection by niobium carbide (NbC) Mathias Woydt As a refractory carbide, niobium carbide (NbC) is today still a forgotten carbide with hidden properties, such as wear resistance, thus qualifying NbC for the group of tribological materials with enhanced wear resistance.

OPUS 4 | Cutting tool materials niobium carbide (NbC ...

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Mathias Woydt. The present paper illuminates the metallurgical progress on niobium carbide based hard metal developments, which are characterized by: a.) the substitution of cobalt binder by nickel, b.) the change from SPS to conventional sintering and c.) by switching from lab to pilot scale. The toughness was increased in the frame of these ...

OPUS 4 | Machining with niobium carbide based tools

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Mathias Woydt Strategic reflections on tungsten carbide and more and more stringent toxicological restrictions for cobalt associated for both with spiraling stock market prices have attracted recently some attention for Niobium carbide as a substitute for tungsten carbide in machining.

OPUS 4 | 2Disk test rig for determining the tribological profile...

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The slip-rolling 2Disk tribometer from Optimol Instruments represented the technological evolution in tribotesting of the well-known AMSLER-type tribometer...

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