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題名 | 雷射蒸鍍結晶性氫氧基磷灰石薄膜於鈦基材結構研究=Structural Characterization of Laser-Deposited Crystalline Hydroxyapatite Film on Titanium Substrate |
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作者姓名(中文) | 王志光; 朱建平; 陳瑾惠; | 書刊名 | 陶業學刊 |
卷期 | 1:1 1997.01[民86.01] |
頁次 | 頁50-57 |
分類號 | 440.34 |
關鍵詞 | 脈衝式雷射蒸鍍; 氫氧基磷灰石; 微結構; Pulsed laser deposition; Hydroxyapatite; Microstructure; |
語文 | 中文(Chinese) |
中文摘要 | 本篇以ArF脈衝式雷射光(plused laser deposition, PLD;193 nm, 21 ns, 230 mj) 蒸鍍多晶性氫氧基磷灰石 (polycrystalline hydroxyapatite; HA) 薄膜鍍層 (roughly 10 μ m) 於商業純鈦 (CP-Ti) 基材上, 探討鍍膜生成相、微結構與基本性質。 結果顯示雷射 HA 鍍層的結構及性質變動與蒸鍍參數有關,目前研究指出雷射蒸鍍氫氧基磷 灰石薄膜的過程除了 apatite 相外,僅微量的 CaO 產生,並無明顯的其它鈣磷相產生,對 於氫氧基 (OH) 或磷酸根 (P-O) 等也無重大相異。以掃描式電子顯微鏡 (SEM) 和原子力顯 微鏡 (AFM) 觀察發現鍍層表面是由大小不同的球形粒子組成, 破斷鍍膜側面顯現存在有柱 狀 (columnar) 和圓頂狀 (dome) 結構, 而鍍膜表面所具有的小孔 (pinholes)、 裂紋 (crevices) 是從基材缺陷延展出來。 鍍層鍵結強度測試發現鍍層與基材介面黏附強度 (adhesion strength ) 大多在 30-40MPa,其中斷裂強度值較高者是在基材與鍍層介面破斷 且鍍層斷裂紋呈現類似流狀變形 (deformation) 的地形 (topography),相對於斷裂強度值 較低者,鍍層斷裂面則發生在鍍層本身並具脆性 (brittle) 斷裂的平面形態。 |
英文摘要 | Crystalline hydroxyapatite (HA) films with thickness of roughly 10 μm have been deposited on titanium substrate using pulsed-laser deposition (PLD) technique. Experimental results indicate that structure and properties of the PLD-HA films varied with deposition parameters. The PLD process used in the present study did not induce significant amounts of other calcium phosphate phases than apatite, or significant changes in the behavior of hydroxyl or phosphate functional group. Broad face SEM showed that HA coating was comprised of numerous essentially spheroidal-shaped particles of different sizes, while the lateral morphology indicated that columnar and dome-shaped structures both existed in the film. Many pinholes and crevices observed on coating surfaces were linked to the original substrate surface crevices/craters. Adhesion strength of the coating, mostly in the range of 30-40 MPa, was found closely related to the fractography of the tested specimen. The fracture surfaces of specimens with higher bond strengths were usually accompanied with a similar deformation morphology and coating-substrate debonding, while the fracture of specimens with lower bond strengths occurred more frequently within HA coating in a more brittle way. |
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