Instability in the tribochemical wear of silicon carbide in unlubricated sliding contacts

Peter Andersson, Adam Blomberg

Research output: Contribution to journalArticleScientificpeer-review

42 Citations (Scopus)

Abstract

The present study is based on tests with sintered silicon carbide sliding unlubricated on itself in point (pin-on-disc), line (journal bearing) and plane (mechanical face seal) contacts. Tribo-oxidation and surface fracture were identified as the dominating deterioration mechanisms. The oxidation products formed were silicon dioxide and, within narrow operational regimes, silicon monoxide. Part of the silicon dioxide wear debris was compacted under frictional heating to form smooth tribofilms on the mating surfaces, providing protection against excessive wear; the corresponding specific wear rates ranged from 10−6 to 10−5 mm3 N−1 m−1. The silicon monoxide, when formed, appeared as a loosely attached powder which provided no protection against wear, as indicated by the one order of magnitude increase in the wear rates. The tribochemical instability has a potential to disturb the otherwise favourable SiC/SiC applications. The highest wear rates occurred in the pin-on-disc configuration, while the lowest rates were obtained in the journal bearing tests.
Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalWear
Volume174
Issue number1-2
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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sliding contact
Silicon carbide
silicon carbides
Wear of materials
journal bearings
Journal bearings
Silicon Dioxide
Silica
Sintered carbides
silicon dioxide
Silicon
Oxidation
oxidation
silicon
deterioration
debris
Debris
Powders
Seals
Deterioration

Cite this

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title = "Instability in the tribochemical wear of silicon carbide in unlubricated sliding contacts",
abstract = "The present study is based on tests with sintered silicon carbide sliding unlubricated on itself in point (pin-on-disc), line (journal bearing) and plane (mechanical face seal) contacts. Tribo-oxidation and surface fracture were identified as the dominating deterioration mechanisms. The oxidation products formed were silicon dioxide and, within narrow operational regimes, silicon monoxide. Part of the silicon dioxide wear debris was compacted under frictional heating to form smooth tribofilms on the mating surfaces, providing protection against excessive wear; the corresponding specific wear rates ranged from 10−6 to 10−5 mm3 N−1 m−1. The silicon monoxide, when formed, appeared as a loosely attached powder which provided no protection against wear, as indicated by the one order of magnitude increase in the wear rates. The tribochemical instability has a potential to disturb the otherwise favourable SiC/SiC applications. The highest wear rates occurred in the pin-on-disc configuration, while the lowest rates were obtained in the journal bearing tests.",
author = "Peter Andersson and Adam Blomberg",
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Instability in the tribochemical wear of silicon carbide in unlubricated sliding contacts. / Andersson, Peter; Blomberg, Adam.

In: Wear, Vol. 174, No. 1-2, 1994, p. 1-7.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Instability in the tribochemical wear of silicon carbide in unlubricated sliding contacts

AU - Andersson, Peter

AU - Blomberg, Adam

N1 - Project code: KOT2011

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Y1 - 1994

N2 - The present study is based on tests with sintered silicon carbide sliding unlubricated on itself in point (pin-on-disc), line (journal bearing) and plane (mechanical face seal) contacts. Tribo-oxidation and surface fracture were identified as the dominating deterioration mechanisms. The oxidation products formed were silicon dioxide and, within narrow operational regimes, silicon monoxide. Part of the silicon dioxide wear debris was compacted under frictional heating to form smooth tribofilms on the mating surfaces, providing protection against excessive wear; the corresponding specific wear rates ranged from 10−6 to 10−5 mm3 N−1 m−1. The silicon monoxide, when formed, appeared as a loosely attached powder which provided no protection against wear, as indicated by the one order of magnitude increase in the wear rates. The tribochemical instability has a potential to disturb the otherwise favourable SiC/SiC applications. The highest wear rates occurred in the pin-on-disc configuration, while the lowest rates were obtained in the journal bearing tests.

AB - The present study is based on tests with sintered silicon carbide sliding unlubricated on itself in point (pin-on-disc), line (journal bearing) and plane (mechanical face seal) contacts. Tribo-oxidation and surface fracture were identified as the dominating deterioration mechanisms. The oxidation products formed were silicon dioxide and, within narrow operational regimes, silicon monoxide. Part of the silicon dioxide wear debris was compacted under frictional heating to form smooth tribofilms on the mating surfaces, providing protection against excessive wear; the corresponding specific wear rates ranged from 10−6 to 10−5 mm3 N−1 m−1. The silicon monoxide, when formed, appeared as a loosely attached powder which provided no protection against wear, as indicated by the one order of magnitude increase in the wear rates. The tribochemical instability has a potential to disturb the otherwise favourable SiC/SiC applications. The highest wear rates occurred in the pin-on-disc configuration, while the lowest rates were obtained in the journal bearing tests.

U2 - 10.1016/0043-1648(94)90080-9

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