本研究分為兩個部分，第一部分為探討Ti-7.5Mo合金與純鈦(Grade 2)運用於牙科中的活動式假牙鑄造的差異性，以釐清Ti-7.5Mo合金作為牙科鑄造合金之潛力。第二部分，則研究不同固溶處理溫度以及不同含量的Ti-Mo二元合金，經熱處理後的機械性質與微結構探討。
首先，Ti-7.5Mo合金與純鈦進行所有包含在牙科鑄造合金規範的測試並探討Ti-7.5Mo合金與純鈦在實際應用上的差距。可發現到Ti-7.5Mo合金除了在雜質元素、密度、熱膨脹率以及固態液態轉換溫度皆無太大的差別。經X光相鑑定結果顯示，Ti-7.5Mo合金多由α”相所組成以極少量的β相，而純鈦則由α/α’相所組成。而金相結果顯示純鈦多為板狀結構，Ti-7.5Mo合金則為針狀α”相以及等軸β相所組成。在實際應用的方面，Ti-7.5Mo合金在網狀鑄造試驗較純鈦高出許多，且由穿透式X光可發現純鈦所製成的活動式假牙有缺陷以及空孔的存在。拉伸測試顯示Ti-7.5Mo合金相較於純鈦更佳的機械性質(Ti-7.5Mo合金：拉伸強度806MPa、拉伸率42%以及70GPa的彈性模數；純鈦：拉伸強度571MPa、拉伸率22%以及113GPa的彈性模數)，而且彎曲測試也顯示Ti-7.5Mo合金由於較純鈦來比有更高的彎曲強度以及更低的彈性模數，使得Ti-7.5Mo合金有更好的彈性回復角(31.5°比上2.8°)，因此可判定Ti-7.5Mo合金較純鈦相比具有更佳的性質，更適合應用於活動式假牙。
第二部分，則探討不同比例的Ti-xMo合金於雙相區內固溶處理後的微結構以及機械性質表現。X光繞射結果顯示，隨著固溶溫度以及Mo含量的上升，β相的峰值也隨之上升，而α/α’相的峰值則隨之下降。Ti-9.5Mo於800℃進行固溶處理後，主要皆由β相所組成，而α”相則於Ti-7.5Mo進行800℃固溶處理後可被觀察到。而Ti-1.5Mo不論在何種溫度之下，大部分板狀的α相結構組成。而機械性質的方面，當固溶溫度為700℃時，降伏強度及最大拉伸強度皆隨Mo含量的上升而上升，最高的拉伸強度則發生於Ti-7.5以及9.5Mo。當固溶溫度達到750℃時，Ti-5.5Mo合金的機械強度有明顯的提升，且其伸長率並未下降，而Mo含量持續上升會導致伸長率隨之增加，但機械強度並無明顯改變。最後，當固溶溫度達到800℃時Ti-3.5、5.5以及7.5Mo合金具有與Ti-1.5以及9.5Mo相對低的機械強度。然而，機械性質的變化由於影響因素眾多，還未有一完善的解釋，但，經由於雙相區內固溶處理後的Ti-Mo合金仍表現出不錯的機械性質。

In this study, first of all a head-to-head comparison was made between an in-house-developed Ti-7.5Mo alloy and commonly-used grade-2 commercially pure titanium (CP-Ti) for dental casting applications. Both metals had undergone a series of tests, and Ti-7.5Mo alloy shows better castability and mechanical properties. Second, investigation of the effect of heat treatment within the alpha (α)/beta (β) dual-phase field on the structure and tensile properties of Ti-(1.5-9.5) mass% Mo alloys. When heat-treated at 700℃, the yield strength (YS) and ultimate tensile strength (UTS) increased while the elongation generally decreased with Mo content. The highest YS and UTS were found in Ti-7.5Mo and Ti-9.5Mo. When heat-treated at 750℃, the strength of Ti-5.5Mo was improved without reducing elongation. With Mo concentration increased to 7.5% or higher, the elongation further increased while the strength maintained a similar level. When treated at 800℃, the YS of Ti-3.5Mo, Ti-5.5Mo and Ti-7.5Mo maintained a lower level than Ti-1.5Mo and Ti-9.5Mo.

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