Tribology and airborne particle emissions from grey cast iron and WC reinforced laser cladded brake discs
(2024) In Wear 556-557.- Abstract
Laser cladding (LC) is a promising technique to overlay a protective coating on grey cast iron (GCI) brake discs to enhance the wear and corrosion resistance. This study utilized a pin-on-disc tribometer in an aerosol chamber to investigate the tribology and airborne particle emissions from tungsten carbides (WC) reinforced coating overlayed onto GCI substrate through laser cladding. Uncoated GCI brake discs served as reference material, while low-metallic (LM) and non-asbestos organic (NAO) brake pads were used as counterparts. The results indicate that LC coating exhibited slightly higher coefficient of friction and significantly lower wear than uncoated GCI discs. Abrasive wear is the dominant wear mechanism for both uncoated GCI... (More)
Laser cladding (LC) is a promising technique to overlay a protective coating on grey cast iron (GCI) brake discs to enhance the wear and corrosion resistance. This study utilized a pin-on-disc tribometer in an aerosol chamber to investigate the tribology and airborne particle emissions from tungsten carbides (WC) reinforced coating overlayed onto GCI substrate through laser cladding. Uncoated GCI brake discs served as reference material, while low-metallic (LM) and non-asbestos organic (NAO) brake pads were used as counterparts. The results indicate that LC coating exhibited slightly higher coefficient of friction and significantly lower wear than uncoated GCI discs. Abrasive wear is the dominant wear mechanism for both uncoated GCI brake discs and LC coatings. LC coatings substantially decreased the particle mass concentrations. All three friction pairs displayed a mass weighted size distribution with a major peak around 2–3 μm. The number size distribution was dominated by a mode below 1 μm. Emissions by number were generally low. Meanwhile, all three friction pairs emitted sheared off and agglomerated particles, with iron being the dominant element. Tungsten was identified in the particles emitted from LC coatings, indicating that the hard coating has a potential to wear off and become airborne particles.
(Less)
- author
- Lyu, Yezhe
LU
; Varriale, Francesco LU ; Malmborg, Vilhelm LU
; Ek, Martin LU
; Pagels, Joakim LU and Wahlström, Jens LU
- organization
-
- Mechanics, Materials and Component Design
- Machine Elements
- LTH Profile Area: Aerosols
- Ergonomics and Aerosol Technology
- NanoLund: Centre for Nanoscience
- Metalund
- LTH Profile Area: Nanoscience and Semiconductor Technology
- LU Profile Area: Light and Materials
- Centre for Analysis and Synthesis
- MERGE: ModElling the Regional and Global Earth system
- LTH Profile Area: The Energy Transition
- publishing date
- 2024-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Brake PM, Laser cladding, Pin-on-disc, Size distribution, Transmission electron microscope, Ultrafine particles
- in
- Wear
- volume
- 556-557
- article number
- 205512
- publisher
- Elsevier
- external identifiers
-
- scopus:85199960363
- ISSN
- 0043-1648
- DOI
- 10.1016/j.wear.2024.205512
- language
- English
- LU publication?
- yes
- id
- 89749071-ec95-4053-8823-8a3b56a7e63b
- date added to LUP
- 2024-08-26 14:15:31
- date last changed
- 2024-08-26 14:16:49
@article{89749071-ec95-4053-8823-8a3b56a7e63b, abstract = {{<p>Laser cladding (LC) is a promising technique to overlay a protective coating on grey cast iron (GCI) brake discs to enhance the wear and corrosion resistance. This study utilized a pin-on-disc tribometer in an aerosol chamber to investigate the tribology and airborne particle emissions from tungsten carbides (WC) reinforced coating overlayed onto GCI substrate through laser cladding. Uncoated GCI brake discs served as reference material, while low-metallic (LM) and non-asbestos organic (NAO) brake pads were used as counterparts. The results indicate that LC coating exhibited slightly higher coefficient of friction and significantly lower wear than uncoated GCI discs. Abrasive wear is the dominant wear mechanism for both uncoated GCI brake discs and LC coatings. LC coatings substantially decreased the particle mass concentrations. All three friction pairs displayed a mass weighted size distribution with a major peak around 2–3 μm. The number size distribution was dominated by a mode below 1 μm. Emissions by number were generally low. Meanwhile, all three friction pairs emitted sheared off and agglomerated particles, with iron being the dominant element. Tungsten was identified in the particles emitted from LC coatings, indicating that the hard coating has a potential to wear off and become airborne particles.</p>}}, author = {{Lyu, Yezhe and Varriale, Francesco and Malmborg, Vilhelm and Ek, Martin and Pagels, Joakim and Wahlström, Jens}}, issn = {{0043-1648}}, keywords = {{Brake PM; Laser cladding; Pin-on-disc; Size distribution; Transmission electron microscope; Ultrafine particles}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Wear}}, title = {{Tribology and airborne particle emissions from grey cast iron and WC reinforced laser cladded brake discs}}, url = {{http://dx.doi.org/10.1016/j.wear.2024.205512}}, doi = {{10.1016/j.wear.2024.205512}}, volume = {{556-557}}, year = {{2024}}, }