| 研究生: |
陳明煌 Ming-Huang Cheng |
|---|---|
| 論文名稱: |
碳化鎢及鈷粒子強化銅基複合材料耐磨耗腐蝕性質之研究 |
| 指導教授: |
李勝隆
Sheng-long Lee |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 畢業學年度: | 89 |
| 語文別: | 中文 |
| 論文頁數: | 98 |
| 中文關鍵詞: | 粉末熱壓燒結 、銅金屬基複合材料 、抗磨耗性 、抗腐蝕性 、抗磨耗腐蝕性 |
| 相關次數: | 點閱:6 下載:0 |
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實驗結果顯示,於銅基材中添加WC顆粒可明顯提升其硬度及抗磨耗性,WC粒徑愈小或WC含量愈高則硬度及抗磨耗性愈高。於3.5% NaCl(pH 6.7)水溶液中,WC的添加使Cu-WC複合材料腐蝕電位提高,而使腐蝕電流增大,腐蝕電位值與WC粒徑及含量無絕對關係,但腐蝕電流隨WC含量愈高而愈大,且WC粒徑較小亦使腐蝕電流增大。Cu-WC複合材料之靜態腐蝕性質較純Cu材料差,WC粒徑較小(1、3μm)及WC含量愈高之材料,其腐蝕損失量較大。磨耗腐蝕實驗中,於陰極電位時,材料之磨耗腐蝕率非常小,而處於陽極電位磨耗時,磨耗率隨外加電位急劇上升。在磨耗與腐蝕相互作用之狀態下,Cu-WC複材之磨耗率較純Cu材料大,WC之粒徑與磨耗腐蝕率並無絕對關係,但WC含量愈高,其磨耗腐蝕率愈大。添加Co於Cu-WC複材中,可明顯提升其抗磨耗性質。於3.5% NaCl(pH 6.7)水溶液中,Cu-WC-Co複合材料的腐蝕電位明顯比Cu-WC複合材料低,但極化曲線有明顯鈍化現象。磨耗腐蝕實驗中,Cu-WC-Co具極佳之耐磨耗腐蝕性質,於鈍化電位區進行磨耗時,具有極低之磨耗腐蝕率。
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