Aufbau und Eigenschaften von lasernitrierten Randschichten auf Aluminiumwerkstoffen

Barnikel, J.; Bergmann, H. W.; Reichstein, S.

doi:10.1515/htm-1998-530518

Cited by 4 publications

(4 citation statements)

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“…Apart from conventional glow discharge nitriding, other methods of obtaining aluminum nitride layers were investigated [1], including ion implantation [10,11], intensified plasma techniques [12][13][14][15], and laser nitriding processes [16,17]. Investigations concerning the application of active screen plasma nitriding [18][19][20] were recently reported.…”

Section: Aluminum Nitriding-state Of the Artmentioning

confidence: 99%

Diffusion Nitride Surface Layers on Aluminum Substrates Produced by Hybrid Method Using Gas Nitriding

Tacikowski,

Słoma,

Jakieła

et al. 2024

Metals

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While gas nitriding of steel is currently used in industry, nitriding of aluminum alloys remains an open challenge. The main obstacle is aluminum’s high susceptibility to passivation. The oxide film provides an effective barrier to nitrogen diffusion. Attempts to overcome this problem have mainly focused on glow discharge nitriding using cathode sputtering of an oxide layer. The produced AlN layers exhibit no diffusion zone and show limited performance properties. In this work, the effect of hybrid treatment aimed at producing diffusion layers of nitrides other than AlN on aluminum alloys was investigated on the model system of iron nitride–aluminum substrate. Hybrid treatment combines an electrochemical process involving the removal of the aluminum oxide layer from the substrate, its subsequent iron plating, and a further gas nitriding in high-purity ammonia. The obtained results prove that the hybrid treatment allows the production, at 530 °C/10 h, of diffusion layers of Fe3N iron nitrides on aluminum substrates with a nitrogen diffusion zone range in aluminum of ca. 12 µm. In alloys containing magnesium, its unfavorable effect on the nitrogen diffusion and the functional properties of the layers was observed. An interesting direction for further research is hybrid treatment of precipitation-hardened alloys without magnesium.

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Section: Aluminum Nitriding-state Of the Artmentioning

confidence: 99%

Diffusion Nitride Surface Layers on Aluminum Substrates Produced by Hybrid Method Using Gas Nitriding

Tacikowski,

Słoma,

Jakieła

et al. 2024

Metals

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“…[48][49][50] Laser nitriding of aluminium alloys in liquid state was investigated by Bergmann and co-workers. [51][52][53][54] They produced by laser gas nitriding on technical alloys crack free, dense, AlN containing gradient surface layers with a thickness up to 20 mm. The layer formation has been explained mainly by surface reactions with nitrogen forming a thin nitride layer, which then experienced mechanical mixing by melt bath movements and convective flow with the following pulses.…”

Section: Laser Gas Alloying Of Titanium and Aluminium Alloys: Laser N...mentioning

confidence: 99%

“…The structure of the laser nitrided surface layer consists of a thin crystalline AlN layer which is supported by a layer of uniaxial AlN crystals in an Al matrix, 51,53 as schematically shown in Fig. 5.…”

Section: Laser Gas Alloying Of Titanium and Aluminium Alloys: Laser N...mentioning

confidence: 99%

“…The process has promising possibilities for the enhancement of the tribological properties of the working surfaces of aluminium cylinders and pistons. 51,54 Energy beam surface melting and alloying of titanium and aluminium alloys Sliding-rolling contact at high contact loads is characteristic for many general engineering components, for example, bearings and gears. A high load bearing Spies Surface engineering of aluminium and titanium alloys: an overview capacity needs a deep case strengthening.…”

Section: Laser Gas Alloying Of Titanium and Aluminium Alloys: Laser N...mentioning

confidence: 99%

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Surface engineering of aluminium and titanium alloys: An overview

Spies

2010

Surface Engineering

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The ever-increasing demands for higher performance, weight reduction and more challenging application conditions have been the main driver for substituting steel and cast iron components with those made from light metals. However, aluminium and titanium alloys are characterised by a poor tribological behaviour, which has been a severe barrier to tribological applications. This shortcoming can be overcome by means of load, material and component specific surface engineering. This paper overviews surface engineering processes currently used for protection of aluminium and titanium components against wear including nitriding, laser gas alloying, electron beam surface alloying and duplex surface engineering.

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Testing the tribological properties of lubricants and materials for the system “piston ring/cylinder liner” outside of engines

Woydt

Kelling

2003

Industrial Lubrication and Tribology

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The test procedure for characterizing the tribological behavior of lubricants and materials for the system "piston ring/cylinder liner" outside of engines is now operational and validated. The test parameters presented in this paper (F N ¼50 N; v ¼ 0.3 m/s, s ¼ 24 km) may act only as an indicator and should be used to the tasks regarded. It allows the check prior expensive engine testing, if a tribomaterial, tribocouple or new lubricant will reach a satisfactory engine performance. The introduction of piston ring segments and cylinder liner as specimen into the test rig as well as the volumetric wear determined by means of stylus profilometry represented a big step forward in order to increase the transferability of "tribotests" to engine tests on an acceptable level.

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Aufbau und Eigenschaften von lasernitrierten Randschichten auf Aluminiumwerkstoffen

Cited by 4 publications

References 0 publications

Diffusion Nitride Surface Layers on Aluminum Substrates Produced by Hybrid Method Using Gas Nitriding

Diffusion Nitride Surface Layers on Aluminum Substrates Produced by Hybrid Method Using Gas Nitriding

Surface engineering of aluminium and titanium alloys: An overview

Testing the tribological properties of lubricants and materials for the system “piston ring/cylinder liner” outside of engines

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