Tribology and mechanical properties of excimer laser mixed Ti-Si-C surface alloys

Tom Jervis, Juha-Pekka Hirvonen, Michael Nastasi

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We have examined the wear and friction and surface hardness of the mixed phase Ti–Si–C alloy formed by excimer laser surface processing of Ti layers on SiC substrates. The friction between a ruby pin and the mixed surface shows a complex behavior depending on relative humidity, a behavior clearly moderated by the chemistry of the interface between the sliding pin and the surface. The friction is sometimes much lower and sometimes comparable to that between the ruby pin and the unalloyed substrate. Wear in the unalloyed case is characterized by fatigue fracture and flaking of the SiC surface which leads to abrasive wear of the ruby pin. In the alloyed case, a transfer film forms and even in the worst case, a smooth wear track results in the alloy and the pin is undamaged. The surface hardness is intermediate between that of the SiC and the unalloyed Ti surface layer. The wear results are understood in terms of changes in the grain boundary structure of the surface induced by the laser alloying process.

Original languageEnglish
Pages (from-to)146 - 151
Number of pages6
JournalJournal of Materials Research
Volume6
Issue number1
DOIs
Publication statusPublished - 1991
MoE publication typeNot Eligible

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tribology
Tribology
Excimer lasers
excimer lasers
mechanical properties
Mechanical properties
ruby
Ruby
Wear of materials
friction
Friction
hardness
flaking
Hardness
abrasives
Substrates
alloying
sliding
humidity
Alloying

Cite this

Jervis, Tom ; Hirvonen, Juha-Pekka ; Nastasi, Michael. / Tribology and mechanical properties of excimer laser mixed Ti-Si-C surface alloys. In: Journal of Materials Research. 1991 ; Vol. 6, No. 1. pp. 146 - 151.
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abstract = "We have examined the wear and friction and surface hardness of the mixed phase Ti–Si–C alloy formed by excimer laser surface processing of Ti layers on SiC substrates. The friction between a ruby pin and the mixed surface shows a complex behavior depending on relative humidity, a behavior clearly moderated by the chemistry of the interface between the sliding pin and the surface. The friction is sometimes much lower and sometimes comparable to that between the ruby pin and the unalloyed substrate. Wear in the unalloyed case is characterized by fatigue fracture and flaking of the SiC surface which leads to abrasive wear of the ruby pin. In the alloyed case, a transfer film forms and even in the worst case, a smooth wear track results in the alloy and the pin is undamaged. The surface hardness is intermediate between that of the SiC and the unalloyed Ti surface layer. The wear results are understood in terms of changes in the grain boundary structure of the surface induced by the laser alloying process.",
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Tribology and mechanical properties of excimer laser mixed Ti-Si-C surface alloys. / Jervis, Tom; Hirvonen, Juha-Pekka; Nastasi, Michael.

In: Journal of Materials Research, Vol. 6, No. 1, 1991, p. 146 - 151.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Tribology and mechanical properties of excimer laser mixed Ti-Si-C surface alloys

AU - Jervis, Tom

AU - Hirvonen, Juha-Pekka

AU - Nastasi, Michael

N1 - Project code: MRG11752

PY - 1991

Y1 - 1991

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AB - We have examined the wear and friction and surface hardness of the mixed phase Ti–Si–C alloy formed by excimer laser surface processing of Ti layers on SiC substrates. The friction between a ruby pin and the mixed surface shows a complex behavior depending on relative humidity, a behavior clearly moderated by the chemistry of the interface between the sliding pin and the surface. The friction is sometimes much lower and sometimes comparable to that between the ruby pin and the unalloyed substrate. Wear in the unalloyed case is characterized by fatigue fracture and flaking of the SiC surface which leads to abrasive wear of the ruby pin. In the alloyed case, a transfer film forms and even in the worst case, a smooth wear track results in the alloy and the pin is undamaged. The surface hardness is intermediate between that of the SiC and the unalloyed Ti surface layer. The wear results are understood in terms of changes in the grain boundary structure of the surface induced by the laser alloying process.

U2 - 10.1557/JMR.1991.0146

DO - 10.1557/JMR.1991.0146

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