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2171 |
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Monday, May 03, 2010, Olivia Room 11:50 AM Wear Protection 1 |
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Characterization of high temperature abrasive wear of cold sprayed FeAl intermetallic compound coating |
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Chang-Jiu Li* / Xi'an Jiaotong University, P.R. China Guan-Jun Yang / School of Materials Science and Engineering, Xi'an Jiaotong University, P.R.China Hong-Tao Wang/ School of Materials Science and Engineering, Xi'an Jiaotong University, P.R.China Su-Ning Zhao/ School of Materials Science and Engineering, Xi'an Jiaotong University, P.R.China Chong-Gao Bao/ School of Materials Science and Engineering, Xi'an Jiaotong University, P.R.China |
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FeAl intermetallic compound coating was prepared by cold spraying a mechanically alloyed Fe(Al) alloy powder followed by post-spray annealing at 950oC. The high-temperature abrasive wear test was carried out for the annealed cold-sprayed FeAl at a temperature range from room temperature to 800oC. The high temperature abrasive wear of a heat-resistant stainless steel 2520 was performed for comparison. The results showed that the annealing treatment of the as-sprayed Fe(Al) alloy coating at a temperature of 950oC results in the formation of dense FeAl intermetallic compound coating with no particle boundaries. It was found that with the increase of the test temperature the wear rate of the stainless steel increased at the temperature higher than 400oC, while the wear rate of cold sprayed FeAl coating tended to decrease at the temperature higher than 400oC. The high temperature abrasive wear resistance of the cold-sprayed FeAl intermetallic compound coating increased with the increase of the abrasive wear temperature in a temperature range from 400oC to 600oC and changed little in the temperature range from 600oc up to 800oC. The wear resistance of cold-sprayed FeAl coating was higher than that of heat-resistant 2520 stainless steel under 800oC by a factor of 3. |