鈦金屬擁有很好的機械性質，鈦基非晶合金的研究也久，但是發展的規模因為鈦的非晶能力不佳而有限。本研究希望可以開發出新成分鈦基塊狀非晶合金，且擁有良好的非晶能力。以二(Ti-Co)元和三元(Ti-Co-M)合金為研究的目標，利用銅模快速冷卻，希望得到塊狀非晶合金。接者做X-ray、DTA等各項分析。在Ti60Co40遠離共晶點的地方，得到一最好的非晶能力，但除非晶之外，仍然有奈米結晶的析出，Ti60Co40的Tg是925 K、Tx是980 K。三元方面是以二元最好的成分Ti60Co40做為基礎，先加入少量的Ni、Sn、Y、Zr等金屬，鑄造1mm的棒材，在加入Ni或Zr的合金中觀察到較好的結果。接著再分別改變Ni和Zr的含量，分析其對合金的非晶能力有何影響。在加入Ni的合金中以Ti60Co20Ni20擁有最好的非晶能力，但在非晶中仍有奈米結晶的析出，Ti60Co20Ni20的Tx是986 K。在Ti-Co中加入少量的Zr，就有相當大的影響，擁有最佳非晶能力的合金成份是Ti60Co36Zr4加入Ni或Zr的三元合金中對於1mm鑄棒的合金無法形成全非晶，還是有大小在10 nm左右的晶粒會析出，Ti60Co36Zr4的Tg是989 K、Tx是1052 K。

Amorphous Ti-based alloys show good mechanical properties and have been investigated for a long time. However, the glass forming ability (GFA) of titanium alloys is not promising so that the development of Ti-based BMGs has been limited. The purpose of this study is to develop the new composition of Ti-based BMGs which have good GFA. The study focused on binary Ti-Co and ternary Ti-Co-M systems. The best composition we evaluated is Ti60Co40 that is far from the eutectic point in Ti-Co binary system. This is the best glass former though it consists of mixed crystalline and amorphous phases. The glass transition temperature of Ti60Co40 is 925 K and the crystalline temperature is 980 K. The nickel, tin, yttrium and zirconium were subsequently added into the binary system individually to cast cylinder with 1 mm in diameter. It shows better GFA with the addition of nickel or zirconium. The best composition of Ti-Co-Ni is Ti60Co20Ni20. The crystalline temperature of Ti60Co20Ni20 is 986 K While the best result of Ti-Co-Zr is Ti60Co36Zr4. Both systems consist of amorphous and crystalline and the size of the crystalline is about 10 nm. The glass transition temperature of Ti60Co36Zr4 is 989 K and the crystalline temperature is 1052 K.

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