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以田口方法探討商用純鈦的微弧氧化陶瓷層耐磨耗之最佳化研究

The optimization of wear-resistance of micro arc oxidation ceramic coating on pure titanium by Taguchi Method

作者:李明禧
畢業學校:大同大學
出版單位:大同大學
核准日期:2015-09-15
類型:Electronic Thesis or Dissertation
權限:Copyright information available at source archive--ttu....

中文摘要

鈦合金雖然具有高比強度、高疲勞強度和高耐蝕性,但因為硬度低,使得其耐磨耗性質需要進一步改善。本研究利用在純鈦基材上,以微弧氧化(MAO)技術,在表面產生附著性極佳的陶瓷層。此陶瓷層為anatase和rutile相及非晶質相所組成。探討電解液成分和電源參數對於MAO鍍層硬度和耐磨性的影響。當電解液使用鋁酸鈉加上矽添加物、硼砂、氟化鈉和乙二醇經微弧氧化所產生的氧化層在XRD分析下,均有二氧化鈦的Anatase phase及Rutile phase之繞射峰。當電解液加入乙二醇,會提高電壓之穩定,並從SEM表面形貌得知,減少多孔層厚度和提高緻密層厚度。氟化鈉可提高電解液電導度,會使反應加劇,可以生成高溫穩定金紅石相,提高緻密層厚度。採用田口實驗設計法尋找最佳化之參數。當電解液參數為編號1,有較佳之硬度值,耐磨耗分析試驗發現,由此得出三組中之摩擦係數都比純鈦之摩擦係數來的小。

英文摘要

Although titanium exhibit a high specific strength, fatigue strength and corrosion resistance, the low hardness limit its mechanical applications. Wear resistance of titanium is imperative before further commercial application. In this study, the titanium metal was used as substrate. The well-adhered and homogeneous micro arc oxidation (MAO) ceramic coating on Ti surface consists of crystalline phases (anatase and rutile) and amorphous phase. The composition of aqueous electrolytic solution and electrical parameters will be accessed in terms of tribological properties. The electrolytes include sodium aluminum, silicates, borax, sodium fluoride and ethylene glycol. The experiments were carried out according to orthogonal array L18 of Taguchi method. The optimal parameters are consistent with the expected results, i.e., leading best tribological properties.


指導教授 - 楊木榮

委員 - 李九龍

委員 - 胡家榮


 

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