Fabrication and properties of plasma-sprayed Al 2O 3/ZrO 2 composite coatings
Al 2O 3/xZrO 2 (where x = 0, 3, 13, and 20 wt.%) composite coatings were deposited onto mild steel substrates by atmospheric plasma spraying of mixed α-Al 2O 3 and nano-sized...
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| Main Authors: | , , , , , |
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| Format: | Review |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84855679339&partnerID=40&md5=52272ea50e579bf646d7abe8344dae14 http://cmuir.cmu.ac.th/handle/6653943832/6407 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Al
2O
3/xZrO
2 (where x = 0, 3, 13, and 20 wt.%) composite coatings were deposited onto mild steel substrates by atmospheric plasma spraying of mixed α-Al
2O
3 and nano-sized monoclinic-ZrO
2 powders. Microstructural investigation showed that the coatings comprised well-separated Al
2O
3 and ZrO
2 lamellae, pores, and partially molten particles. The coating comprised mainly of metastable γ-Al
2O
3 and tetragonal-ZrO
2 with trace of original α-Al
2O
3 and monoclinic-ZrO
2 phases. The effect of ZrO
2 addition on the properties of coatings were investigated in terms of microhardness, fracture toughness, and wear behavior. It was found that ZrO
2 improved the fracture toughness, reduced friction coefficient, and wear rate of the coatings. © ASM International. |
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