段維新臺灣大學:材料科學與工程學研究所黃于容Huang, Yu-RungYu-RungHuang2007-11-262018-06-282007-11-262018-06-282005http://ntur.lib.ntu.edu.tw//handle/246246/55308氫氧基磷灰石的主要成分與生物骨頭的無機物成分相似,是極具生物相容性的外科植入材料。但是,即使合成氫氧基磷灰石的方法已發展了一段不短的時間;時至今日,人工合成的氫氧基磷灰石的缺點仍是其不高的機械性質。因此,許多研究團隊便嘗試製作氫氧基磷灰石的複合材料,希望能在不影響其良好生物相容性的條件下,有效提升氫氧基磷灰石的強度。 本研究以固態合成法製作氫氧基磷灰石,經球磨機以及攪磨機研磨出不同粒徑大小的氫氧基磷灰石粉末,再分別添加不同比例的金纖維進入兩種不同粒徑尺寸的氫氧基磷灰石基材中。將這些複合材料在1300℃的溫度下進行燒結。燒結之後的材料,相對密度會因為基材粒徑尺寸較小而有明顯提升;此外,金纖維的添加會產生類似觸媒的效果,促進相對密度與機械性質的改善。 本研究以四點彎曲的方式量測撓曲強度。HA/Au wire複合材的強度並未隨著第二相添加量之增加而有顯著提升,顯示金纖維並不會影響其撓曲強度的大小,由此可知,強度變化的趨勢是與密度有關。本研究以單邊切槽法(SENB)的方式量測破壞韌性,得到的結果顯示與強度測試有不同的趨勢,HA/Au wire的機械性質在Au wire微量添加下會大幅提升,顯示韌性的增加除了與密度有關之外,延性材料的添加亦扮演重要角色。Hydroxyapatite (HA) is the bio-compatible material for surgical implants, at present, due to the major mineral constituents of it are similar to animals frames. Although the technique to synthesize HA has been developed for a long period, synthetic HA is still limited by its poor mechanical properties. In the present study, we have prepared two HA matrixes with different particle size and doping gold wire as the toughened phase in hydroxyapatite((Ca10(PO4)6(OH)2, HA) matrix which was synthesized by solid-state synthesis to form ceramic composite reinforcement and to expect the possible strategies to improve the toughness of HA are proposed. Solid-state synthesis was used to prepare the hydroxyapatute, and get two different size HA powder by ball milling and attrition mill methods. The different vatio of Au wire then add entered in two kinds of HA matrix that with different particle size. These composites undergo sintering at 1300℃.The relative density of these composites after sintering have obviously improved because the smaller particle size, and furthermore there are catalyst reaction by Au wire that better the densification and mechanical properties of composites. The flexural strength was determined by using the 4-point bending technique. The strength of HA/Au wire composites does not increase when a small amount of Au wire is added. It illustrated that the Au wire would not influence flexural strength. Thus it could be known, the strength variation of HA/Au wire composites corresponds closely to their density variation. The fracture toughness was determined by using the single-edge-notched beam method. The different results were obtained as that for strength. The toughness of HA/Au wire composites has superior increased by doping trace Au wire. The toughness data shows that the increase of toughness is related to density and the doped of Au ductility material.第一章 前言 1 第二章 文獻回顧 3 2.1 硬組織填充替代物 3 2.2 氫氧基磷灰石(HA; Ca10(PO4)6(OH2)) 5 2.2.1 固態合成法 7 2.3 金(gold, Au) 9 2.4 纖維複合材料 9 2.3.1 纖維複合材料的基本力學理論 11 2.3.2 纖維複合材料的破壞現象 12 2.4 陶瓷基複合材料的韌化機制 13 2.4.1易延展相的架橋破壞 17 2.4.2 鬚晶/纖維強化 20 2.5 孔隙率對機械性質的影響 23 第三章 實驗方法及步驟 25 3.1 實驗流程 25 3.2 實驗材料 26 3.3 製備氫氧基磷灰石粉末 26 3.4 氫氧基磷灰石/金複合材料的製備 28 3.4.1球磨後的 HA / Au wires 複合材料 28 3.4.2 攪拌研磨後的HA / Au wires 複合材料 29 3.5 X-ray繞射分析 30 3.6 試樣的密度量測 30 3.7 掃描式電子顯微鏡(SEM)分析 33 3.8 機械性質測試 33 3.8.1 抗彎強度 33 3.8.2 破裂韌性 34 第四章 實驗結果與討論 36 4.1 氫氧基磷灰石粉末分析 36 4.1.1 氫氧基磷灰石的相分析 36 4.1.2 研磨方法對氫氧基磷灰石粉末的影響 37 4.2 氫氧基磷灰石/金纖維複合材料分析 39 4.2.1 氫氧基磷灰石/金纖維複合材料的燒結行為 39 4.2.2 X-ray 繞射分析 42 4.2.3 氫氧基磷灰石/金纖維複合材料的緻密度分析 44 4.2.4 破裂表面的微結構觀察 46 4.2.5 機械性質測試 50 4.2.5.1 彎曲強度 50 4.2.5.2 破裂韌性 52 4.3氫氧基磷灰石/金粉末複合材料 54 第五章 結論 57 5.1 研磨方法不同所造成的影響 57 5.2 氫氧基磷灰石/金纖維複合材料 57 第六章 參考文獻 593430776 bytesapplication/pdfen-US氫氧基磷灰石金複合材料HydroxyapatiteAuComposites氫氧基磷灰石與金纖維複合材料之機械性質The Mechanical Properties of Hydroxyapatite / Au wires Compositesthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/55308/1/ntu-94-R92527017-1.pdf