Titanium-tantalum base shape memory alloys, actuator and engine
AssigneeUniversity of Tsukuba
InventorsShuichi Miyazaki, Heeyoung Kim, Buenconsejo Pio, Hideki Hosoda
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Abstract
A Titanium-Tantalum base shape memory alloy is provided which possesses high machinability and is suitable for repeated high temperature operation. The Titanium-Tantalum base shape memory alloy consists of 15 mol %-40 mol % Tantalum, additive elements, and the balance Titanium and impurities.
Claims16
A Titanium-Tantalum base shape memory alloys, wherein said alloy consists of 30 mol %-40 mol % Tantalum and the balance Titanium and impurities.
A Titanium-Tantalum base shape memory alloy, wherein said alloy consists of 24 mol %-35 mol % Tantalum, one or more of Aluminum and Silicon, wherein the total percentage of Aluminum and Silicon is 0.5 mol %-7 mol %, and the balance Titanium;
- and impurities.
A Titanium-Tantalum base shape memory alloy, wherein said alloy consists of 25 mol %-35 mol % Tantalum, one or more of N, O, B, and C, wherein the total percentage of N, O, B, and C is 0.1 mol %-1 mol %;
- and the balance Titanium and impurities.
A Titanium-Tantalum base shape memory alloy, wherein said alloy consists of 15 mol %-35 mol % Tantalum, one or more of V and Nb, wherein the total percentage of V and Nb is 0.5 mol %-12 mol %, and the balance Titanium, and impurities.
A Titanium-Tantalum base shape memory alloy, wherein said alloy consists of 20 mol %-35 mol % Tantalum, 0.1 mol %-2 mol % transition metal elements, and the balance Titanium and impurities.
A Titanium-Tantalum base shape memory alloy, wherein said alloy consists of 25 mol %-35 mol % Tantalum, 0.5 mol %-10 mol % Zirconium or Hafnium, and the balance Titanium, and impurities.
A Titanium-Tantalum base shape memory alloy, wherein said alloy consists of 25 mol %-35 mol % Tantalum, 0.5 mol %-5 mol % Tin, and the balance Titanium and impurities.
A shape memory alloy, consisting essentially of:
- 15-35 mol % Tantalum (Ta);
- Titanium (Ti);
- and
- one or more of Aluminum (Al), Silicon (Si), Nitrogen (N), Boron (B), Oxygen (O), Carbon (C), Vanadium (V), Niobium (Nb), Molybdenum (Mo), Iron (Fe), Mn (Manganese), Cobalt (Co), Chromium (Cr), Nickel (Ni), Zirconium (Zr), Hafnium (Hf), and Tin (Sn);
- wherein the total percentage of Ta, Nb, and V is 23 mol %-35.5 mol %;
- and
- wherein the elements are provided in an amount such that the alloy exhibits a Tantalum equivalent between 30 to 39.5 mol. %, the Tantalum equivalent calculated according to the equation:
- Ta equivalent(mol. %)=Ta (mol. %)+1.2Al(mol %)+5.6Si(mol. %)+8.3(N(mol %)+B(mol %)+C(mol %)+O(mol. %)+Mo(mol %))+3.9V(mol %)+1.7Nb(mol %)+6.4(Fe(mol %)+Mn(mol. %))+5.0 (Co(mol %)+Cr(mol %))+4.2Ni(mol %)+1.1Zr(mol %)+1.1Hf(mol %)+2.8Sn(mol %).
Dependencies are inferred from the claim text.