Improvement of erosion resistance of titanium with different surface treatments

To improve the erosion resistance of titanium, several surface treatment methods were applied: (1) duplex treatment with carbon nitride film deposited on a plasma-nitrided layer, (2) diamond coating, and (3) laser alloying. Duplex treatment could impove the erosion resistance of Ti under a low impac...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2000-10, Vol.9 (5), p.571-579
Main Authors: Fu, Yongqing, Du, Hejun, Gu, Yanwei
Format: Article
Language:English
Subjects:
Alloying
Applied sciences
Carbon nitride
Cross-disciplinary physics: materials science
rheology
Diamond films
Erosion resistance
Exact sciences and technology
Flakes
Friction, lubrication, and wear
Ion nitriding
Materials science
Metals. Metallurgy
Physics
Surface treatment
Titanium
Treatment of materials and its effects on microstructure and properties
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Summary:To improve the erosion resistance of titanium, several surface treatment methods were applied: (1) duplex treatment with carbon nitride film deposited on a plasma-nitrided layer, (2) diamond coating, and (3) laser alloying. Duplex treatment could impove the erosion resistance of Ti under a low impact velocity of erosion particles. However, under a high velocity of erosion particles, because of the shallow depth of the plasma-nitrided layer and low loads-bearing capacity of carbon nitride layer on the plasma-nitrided specimen, the improvement of erosion resistance was not significant. Diamond coatimgs with a thickness of 15 mu m made no significant improvement on the erosion resistance of the Ti substrate. The large-area spallation of diamond coating during erosion was observed, probably due to the high residual stresses, poor load-bearing capacity, and brittle nature of diamond caotings. Compared with untreated Ti substrate, the erosion resistance of the laser-alloyed (nitrided) specimen was improved significantly. The erosion mechanisms for laser-nitrided Ti were characterized by shipping, brittle fracture, and formation of large flakes in the laser-nitrided layers.
ISSN:1059-9495
1544-1024
DOI:10.1361/105994900770345719