| 研究生: |
張啟釗 Chang, Qi-Zhao |
|---|---|
| 論文名稱: |
摻雜銀、鎢元素之氮化鈦陶瓷薄膜磨潤性能研究 Tribological properties of TiN ceramic films with silver and tungsten dopants. |
| 指導教授: |
蘇演良
Su, Yean-Liang |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 88 |
| 中文關鍵詞: | 濺鍍機 、氮化鈦 、奈米複合材料 |
| 外文關鍵詞: | sputtering machine, TiN, nanocomposite materials |
| 相關次數: | 點閱:118 下載:2 |
| 分享至: |
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本實驗乃利用(i)中頻雙極式磁控與非平衡磁控濺鍍混合系統及(ii) 封閉式非平衡磁控濺射系統;分別濺鍍固體鈦靶、銀靶及鎢靶,以個別被覆含銀、鎢之TiN系列陶瓷薄膜。實驗目的主要研究Ti-Ag-N與Ti-W-N鍍膜其磨潤性質與被覆車刀之乾車削性能。
實驗中鍍膜被覆共分為兩個部分;PartⅠ& PartⅡ。以PartⅠ;Ti-Ag-N鍍層而言;分為兩階段,第一階段為找出TiN最佳之氮氣流量值,並添加銀元素於TiN鍍層中,分別探討氮氣流量與添加銀元素後之鍍膜在鍍膜磨潤性質上的影響。第二階段則改變基材偏壓,進行實地乾車削試驗,以了解鍍膜被覆車刀之乾車削性。PartⅡ,就Ti-W-N鍍層來說,直接添加鎢元素於TiN鍍層中,找出Ti-W-N鍍層中最佳摻雜鎢元素之範圍,且進行乾車削試驗,得到最佳被覆車刀之鍍層。
由PartⅠ第一階段鍍膜實驗結果,得到氮氣流量20sccm時有最佳的TiN鍍膜,鍍膜硬度會隨氮氣流量上升而增大。且添加銀元素後,經SRV與Pin-on-disk磨耗試驗證實,當銀含量為0.17at%時,由於細晶強化的作用,有最高的硬度值,抗磨耗性最好。另外,在第二階段鍍膜車削性能上,以銀含量14.57at%時的刀具磨耗量最小,其刀具壽命為未被覆鍍層刀具的三倍。
在PartⅡTi-W-N鍍膜方面,由TF-XRD分析,隨鎢含量的增加,δ-WN相的繞射峰波愈強,硬度值也愈高,當鎢含量為37.9at%時,硬度值約為TiN鍍膜的2.5倍。經SRV與Pin-on-disk磨耗試驗結果,以鎢含量13.72at%時抗磨耗性最好,而在鎢含量6.45at%時摩擦係數最低。於鍍膜被覆車刀乾車削試驗上,以鎢含量13.72at%時刀具磨耗量最小,其刀具壽命為未被覆鍍層及TiN刀具的三倍。
The main purpose of this study is to receive TiN ceramic films with silver and tungsten dopants and research the tribological properties and turning performance of Ti-Ag-N and Ti-W-N coatings by sputtering titanium, silver and tungsten targets separately with (i) a medium frequency Twin magnetron sputtering and unbalanced magnetron sputtering hybrid system and (ii) closed unbalanced magnetron sputtering system.
It contains two parts of research in this study:PartⅠ& PartⅡ.About PartⅠ,Ti-Ag-N coatings ,it has two stages. Find out the best nitrogen flow and add silver dopant of TiN in first stage. Confer to the effects of nitrogen flow and silver dopant of films on tribological properties. Changing the bias of substrate in second stage. Finally, a dry turning of coated inserts will be undergone to understand the turning performance of coatings. At PartⅡ,Ti-W-N coatings, add tungsten dopant in TiN film directly. To discover the perfect range of tungsten content in films and carry out a dry turning, too. Then we can obtain the best tool of coated inserts.
Via PartⅠexperiment results in first stage, we acknowledge that the coating prepared under the 20 sccm of nitrogen flow has optimum TiN film. The hardness of coatings will be raised with the nitrogen flow increase. In Ti-Ag-N films, after SRV and Pin-on-disk tribological test, when the silver content is 0.17at%, due to the influence of Fine-grained Strengthening, we get the maximum hardness and the best wear resistance. Besides the turning performance of coatings in the second stage, it will have the minimum flank wear and the three times tool life more than uncoated one under the 14.57at% of silver content of coated inserts.
On the other hand ,PartⅡTi-W-N coatings, by way of TF-XRD analysis, we acquire that the intensity of δ-WN phase and hardness of coatings will be step up with the tungsten content increase. The hardness will 2.5 times more than TiN film under 37.9 at% of tungsten content. After SRV and Pin-on-disk tribological test, when the tungsten content in 13.72at% we get the best wear resistance, and in 6.45 at% one the wear coefficient is minimum. To mention the turning performance of coatings, it will have the minimum flank wear and the three times tool life more than uncoated and TiN ones under the 13.72at% of tungsten content of coated inserts.
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