WO2005005676A1 - チタン合金 - Google Patents
チタン合金 Download PDFInfo
- Publication number
- WO2005005676A1 WO2005005676A1 PCT/JP2004/007830 JP2004007830W WO2005005676A1 WO 2005005676 A1 WO2005005676 A1 WO 2005005676A1 JP 2004007830 W JP2004007830 W JP 2004007830W WO 2005005676 A1 WO2005005676 A1 WO 2005005676A1
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- WO
- WIPO (PCT)
- Prior art keywords
- alloy
- titanium alloy
- melting point
- alloys
- tntz
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
Definitions
- the present invention relates to a titanium alloy. More specifically, the present invention relates to a titanium alloy for living organisms that can be suitably used for dental materials, medical materials and the like.
- a titanium alloy for a living body used for an artificial dental root for dental use or an artificial bone for medical use a titanium alloy for a living body disclosed in Japanese Patent Application Laid-Open No. 10-219375 is known.
- the titanium alloy for living body disclosed in this publication contains Nb and Ta in a total of 20 wt% to 60 wt%, contains Zr if necessary, and the balance is composed of Ti and unavoidable impurities. According to this titanium alloy, it does not contain V (vanadium) etc., which has been pointed out to be highly toxic to the human body because of its high corrosion resistance, contains Nb and Ta, which are highly biocompatible, and is
- a titanium alloy for living body having an appropriate elastic modulus close to that of human bone can be realized.
- Such a titanium alloy for living bodies has been specifically proposed by the present inventors as a Ti-29Nb-13Ta-4.6Zr alloy (hereinafter referred to as a TNTZ alloy).
- the above-mentioned conventional titanium alloy contains high-melting elements such as Nb and Ta, and thus has a higher melting point than conventional metal materials for living organisms. There is a tendency. Therefore, when considering the application to the dental field, etc., where artificial products occupy a large part, a reaction occurs between the surface of the product and the mold, and seizure etc. occurs on the surface of the precision-alloyed titanium alloy. May occur.
- the present invention has been made in view of such a problem, and an object of the present invention is to maintain high performance equivalent to that of a conventional titanium alloy in terms of corrosion resistance, biocompatibility, and the like, while maintaining a low melting point. Another object of the present invention is to provide a titanium alloy.
- the first invention contains Nb and Zr, and further contains a small amount selected from the group consisting of Cr, Fe and Si. At least one element is contained, and the balance is Ti and a titanium alloy that is an unavoidable impurity. According to such a titanium alloy, it has high biocompatibility and corrosion resistance by containing Nb and Zr without containing elements such as V (vanadium) which are pointed out to be toxic or allergic.
- a titanium alloy having a lower melting point than a conventional titanium alloy for example, a TNTZ alloy
- the second invention contains Nb: 25 to 35% and Zr: 5 to 20% by mass, and further contains 0.5% of at least one element selected from the group consisting of Cr, Fe, and S. It is a titanium alloy containing the above and the balance being Ti and unavoidable impurities.
- a third invention is a titanium alloy for living body used as a dental material or a living tissue replacement material in the titanium alloy of the first invention or the second invention. Since the titanium alloy of the present invention has a low melting point, it has a very large utility as a titanium alloy for living organisms, which has a low reactivity with the mold during fabrication. Therefore, the titanium alloy of the present invention can be particularly preferably used as a precision dental material such as an artificial tooth root or a denture manufactured by a structure, or a biological tissue substitute material such as an artificial bone, a prosthesis, or a prosthesis.
- a fourth invention is an artificial tooth root manufactured by manufacturing the titanium alloy of the first invention or the second invention.
- a fifth invention is a denture manufactured by manufacturing the titanium alloy of the first invention or the second invention.
- the Nb content is preferably 25% or more and 35% or less by mass ratio to the entire titanium alloy. If the Nb content is less than 25%, the ⁇ phase tends to precipitate in the alloy structure, and if the Nb content is more than 35%, the alloy tends to have insufficient elongation. Because.
- the content of Zr is preferably 5% or more and 20% or less by mass ratio to the entire titanium alloy. Setting the Zr content in this range not only increases the stability of the titanium alloy, but also is a force capable of realizing a titanium alloy having high biocompatibility.
- the content of at least one element selected from the group consisting of Cr, Fe, and S is preferably 0.5% or more by mass ratio to the entire titanium alloy. Good. If these elements are contained in an amount of 0.5% or more, the melting point of the titanium alloy can be lowered.
- the titanium alloy according to the present invention is a new titanium alloy having a lower melting point than conventional titanium alloys while maintaining various properties such as corrosion resistance and biocompatibility equal to or higher than conventional titanium alloys. It is.
- five types of titanium alloys were manufactured in order to evaluate the characteristics of the titanium alloy.
- the tensile properties, hardness properties, and the like of the manufactured titanium alloy were measured.
- the constituent elements of the conventional titanium alloy for living body Ti-29Nb-13Ta-4.6Zr alloy (TNTZ alloy), take into account various factors such as toxicity of single metal to cells, biocompatibility, and polarization resistance. Has been determined. Therefore, in the present invention, the biocompatibility was sufficiently considered, and a Ti-Nb-Zr alloy in which Ta having a high melting point was excluded from the TNTZ alloy was adopted as the basic composition. According to the binary phase diagram, at least one of Cr Si and Fe was selected as an additive element for the alloy that could effectively lower the melting point.
- the alloy design uses a d-electron alloy design method in which the strength of the bond with the alloy element is evaluated using two alloy parameters: the bond order (Bo value) and the d-orbital energy level (Md value).
- Bond order the bond order
- Mo value the d-orbital energy level
- Md value the d-orbital energy level
- the titanium alloys A to E in Table 1 above were produced. Each alloy was weighed to a total weight of 45 g, and then melted in a high-purity argon gas atmosphere using a non-consumable electrode type arc furnace. At this time, in order to avoid micro-segregation due to smelting, etc., the smelting button ingot was turned upside down, and the re-melting process was repeated 5 times or more.
- the investment material has been refined by removing the silica-based expanding material and alumina from the magnesia-based investment material to reduce the reaction with the titanium alloy, which is a high melting point and highly active material, and miniaturizing the main base material, magnesia.
- a model investment material (trade name: Titan Vest C Kai 2: Okazaki Minerals Co., Ltd.) was used.
- a mixed solution was prepared by mixing distilled water and a dedicated liquid at a ratio of 4: 1, the investment material and the mixed solution were mixed at a ratio of 100: 18, and the mixture was stirred under vacuum for 1 minute using a vacuum stirrer.
- the slurry after the stirring was poured into the mold while vibrating with a vibrator, and was held and dried in the atmosphere at room temperature (295K) for 2 hours.
- the magnesia investment was fired at room temperature with 0.083 KZs, maintained at 1373 K for 3.6 ks, cooled to room temperature, and used for production.
- a vacuum pressurized machine (trade name: Autocast HC-m (manufactured by GC Corporation) was used for the production of the titanium alloy.
- the shape of the alloy was deformed into a dome shape by heating, held for 8 seconds, and the structure was formed by pressurizing with argon gas (0.89 MPa).
- the produced alloy was cooled to room temperature together with the mold in the atmosphere.
- each design alloy A to E
- a 0.4 mm diameter W5Re-W26Re thermocouple capable of measuring the temperature up to about 2500 K was used. After this thermocouple was installed in the mold, each design alloy was fabricated, the temperature change from the molten metal state was measured, and a cooling curve for each design alloy was created.
- the melting point of each design alloy was defined as the transition temperature of the cooling curve due to the phase transformation during cooling or the saturation temperature after supercooling.
- a tensile test piece as shown in Fig. 1 was used.
- the tensile test piece shown in Fig. 1 is a rod-shaped test piece with a diameter of 3.5 mm between the gauge points.
- a wax pattern having the same shape as the test piece to be prepared is made of polyethylene and wax, and a runner and a sprue are attached to this wax pattern and then buried. ⁇ was fabricated by embedding in the material. Pour each of the design alloys A-E into the mold, and form each of the design alloys with the mold. After removing the mold, remove the molded product, sand-blast the surface with sand blast, and machine the gate. The portion was cut to produce a tensile test piece as shown in FIG.
- the load was measured using a load cell of the testing machine, and the displacement was measured using a strain gauge and a reading microscope that were directly attached between the gauges of the test piece.
- the grip section of a test specimen having the same shape as the tensile test specimen was wet-polished with emery paper up to # 1500, and the force near the specimen surface ( ⁇ skin) after wet polishing was applied to the inner part. Measurements were taken at an interval of m up to a depth of 500 m. The measurement was carried out using a micropicker hardness tester at a load of 200 g and a holding time of 15 s.
- test piece after the Pickers hardness test was mirror-finished by buffing with a silicon dioxide suspension, and then subjected to corrosion treatment on the test piece surface with a 5% hydrofluoric acid aqueous solution. Observation was performed using.
- a scanning electron microscope SEM was used for observation of the fracture surface after the tensile test.
- SEM scanning electron microscope
- a portion of the tensile test specimen with a fracture surface force of about 3 mm was cut with a mechanical squeeze and subjected to ultrasonic cleaning with acetone.
- Figure 2 shows the solidification process of the molten metal in the A-E design alloys and TNTZ alloys 3 shows the cooling curve of the sample.
- the cooling rate transition point that appears in the initial stage of cooling for each design alloy is generally lower than that of the conventional titanium alloy, TNTZ alloy.
- the melting point of each of the design alloys A to E was lower than the melting point of the TNTZ alloy in the range of about 50K to 370K.
- A: T 29Nb-13Zr-2Cr alloy showed the lowest melting point of about 2050K.
- each of the design alloys A to E and the TNTZ alloy as a comparative example were visually compared. As a result, it was found that the TNTZ alloy had a graphite color on the surface of the preform, and had a high tendency to adhere to the preform. On the other hand, the structure surface of each of the design alloys A to E partially had a region exhibiting a gold color, and exhibited metallic luster as a whole.
- a stable passivation layer an oxide film
- the color of the alloy surface changes depending on the thickness of the oxide film.
- the gold color observed on the surface of each of the design alloys A to E is considered to be caused by the thickness of the oxide film of about 20 nm.
- the other regions have a metallic luster, it is considered that the melting point of each design alloy was lower than the melting point of the TNTZ alloy, and the reactivity with type III was reduced.
- Figure 3 shows the Vickers hardness from the vicinity of the specimen surface ( ⁇ skin) to the inside (surface force of about 500 ⁇ m) in the cross section of the tensile test specimen grip of each of the design alloys A to E and the TNTZ alloy as a comparative example. 2 shows the distribution of the height.
- the area of approximately 200 m from the skin surface to the inside of each of the design alloys A to E has a higher Vickers hardness value than the matrix near the center of the test piece. Exists. This region is considered to be a reaction hardened layer with the mold during fabrication, and the thickness of the reaction hardened layer is almost equal to the thickness of the reaction hardened layer in the TNTZ alloy.
- the Vickers hardness near the specimen surface of each of the A-E design alloys is distributed in the range of 400Hv to 500Hv, while the Vickers hardness of the TNTZ alloy specimen surface is the highest at about 56 OHv. Indicates the value. This is thought to be due to the fact that the melting point of each of the design alloys A to E was lower than that of the TNTZ alloy, which reduced the reactivity with type III and suppressed the diffusion of oxygen.
- Fig. 4 shows the test results of the tensile strength and elongation of each of the design alloys A to E and the TNTZ alloy.
- the tensile strength of all the design alloys except for the D: Ti-29Nb-10Zr-0.5Cr-0.5Fe alloy exceeds 700MPa, which is about 100MPa higher than the tensile strength of the TNTZ alloy. It became.
- Ti-29Nb-10Zr-0.5Cr-0.5Fe alloy showed the highest value of 21%, which was almost equal to the elongation of TNT Z alloy (about 23%), indicating high ductility.
- Si containing C Ti-29Nb-lOZr-0.5Si alloy and E:
- the elongation of the T29Nb-18Zr-2Cr-0.5Si alloy was less than 3%, indicating a tendency to become brittle compared to other alloys.
- Fig. 5 shows electron micrographs of the fractured portions of the design alloys A to E and the TNTZ alloy as a comparative example after the tensile test.
- B Ti-29Nb-15Zr-1.5Fe alloy
- D Ti-29Nb-15Zr-1.5Fe alloy
- T-29Nb-lOZr-0.5Cr-0.5Fe alloy In the case of T-29Nb-lOZr-0.5Cr-0.5Fe alloy, a cross-sectional area reduction of more than 51% can be observed. it can. In contrast, in the case of C: Ti-29Nb-lOZr-0.5Si alloy and E: Ti-29Nb-18Zr-2Cr-0.5Si alloy, no constriction was observed in the vicinity of the fracture surface, and the crack was perpendicular to the stress axis. The steel showed a low ductile fracture behavior.
- Figure 6 shows optical micrographs of the microstructures near and inside the specimen surface of each of the design alloys A to E and the TNTZ alloy. The elongation in the tensile test was the best.
- D The crystal grain size near the specimen surface of the Ti-29Nb-10Zr-0.5Cr-0.5Fe alloy showed a slight tendency to become coarser than that of other design alloys.
- the crystal grain size on the test piece surface of each of the design alloys A, B, and D tended to be almost equal to the crystal grain size inside the test piece. That is, C: Ti-29Nb-lOZr-0.5Si alloy and E: Ti-29Nb-18Zr-2Cr-0.5Si
- Nb and Zr are contained, and at least one element selected from the group consisting of Cr, Fe and Si is contained, and the balance is Ti and unavoidable impurity power.
- a new titanium alloy was designed.
- a test piece was prepared by manufacturing such a titanium alloy, and various tests were performed for comparison with a conventional titanium alloy (TNTZ alloy). This confirms that the titanium alloy of the present invention has the same or higher tensile strength and ductility as the conventional titanium alloy, and also has a lower melting point than the conventional titanium alloy. Was completed.
- the titanium alloy of the present invention has high biocompatibility! ⁇ ⁇
- dental material for! Is very useful as a substitute for living tissue.
- the titanium alloy of the present invention has a low melting point and thus a low reactivity with a mold, and is extremely useful as a precision dental material such as a denture manufactured mainly by structure.
- the titanium alloy of the present invention can be used as a substitute material for various living tissues such as an implant material, an artificial joint, an orthodontic material, or an auxiliary material for a part thereof, in addition to the above-mentioned uses.
- the composition of the titanium alloy of the present invention is not limited to the composition of the titanium alloy A to E shown in [Table 1].
- Fe and Si may be added if at least one element selected from the group consisting of Cr, Fe, and S is added, or Cr, Fe, All of Si may be added.
- FIG. 1 is a view showing the shape of a bow I tension test piece for evaluating bow and tension properties of each of the design alloys A to E and a TNTZ alloy.
- FIG. 2 is a view showing a cooling curve in a solidification process of a molten metal in a mold of each of the design alloys A to E and a TNTZ alloy.
- FIG. 3 Distribution of Vickers hardness from near the test specimen surface ( ⁇ skin) to the inside (about 500 ⁇ m from the surface) in the cross section of the tensile test specimen grip of each of the design alloys A to E and TNTZ alloy.
- FIG. 4 is a view showing test results of tensile strength and elongation of each of the design alloys A to E and the TNTZ alloy.
- FIG. 5 shows electron micrographs of fractured portions of each of the design alloys A to E and the TNTZ alloy after a tensile test.
- FIG. 6 shows optical micrographs of the microstructure near and inside the specimen surface of each of the design alloys A to E and the TNTZ alloy.
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Epidemiology (AREA)
- Metallurgy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Dental Preparations (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003196530A JP4350443B2 (ja) | 2003-07-14 | 2003-07-14 | チタン合金 |
JP2003-196530 | 2003-07-14 |
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WO2005005676A1 true WO2005005676A1 (ja) | 2005-01-20 |
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PCT/JP2004/007830 WO2005005676A1 (ja) | 2003-07-14 | 2004-06-04 | チタン合金 |
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WO (1) | WO2005005676A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018181937A1 (ja) * | 2017-03-31 | 2018-10-04 | 日本発條株式会社 | チタン合金素材 |
CN110284020A (zh) * | 2019-07-08 | 2019-09-27 | 东南大学 | 一种耐腐蚀高塑性钛基复合材料及其制备方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8512486B2 (en) * | 2006-04-04 | 2013-08-20 | Daido Tokushuko Kabushiki Kaisha | Beta-type titanium alloy and product thereof |
EP2297370B1 (en) * | 2008-05-28 | 2013-12-04 | Korea Institute Of Machinery & Materials | Beta-based titanium alloy with low elastic modulus |
JP5272533B2 (ja) * | 2008-06-18 | 2013-08-28 | 大同特殊鋼株式会社 | β型チタン合金 |
JP5272532B2 (ja) * | 2008-06-18 | 2013-08-28 | 大同特殊鋼株式会社 | β型チタン合金 |
KR101234505B1 (ko) * | 2012-11-08 | 2013-02-20 | 한국기계연구원 | 선형적 탄성변형을 하며 초고강도, 초저탄성 특성을 가지는 타이타늄 합금 |
US10487385B2 (en) * | 2016-07-18 | 2019-11-26 | Pulse Ip, Llc | Titanium based ceramic reinforced alloy |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2935806B2 (ja) * | 1994-03-14 | 1999-08-16 | 株式会社日本製鋼所 | 水素貯蔵材料 |
JP2001348635A (ja) * | 2000-06-05 | 2001-12-18 | Nikkin Material:Kk | 冷間加工性と加工硬化に優れたチタン合金 |
JP2003320061A (ja) * | 2002-05-01 | 2003-11-11 | Sumitomo Rubber Ind Ltd | ウッド型ゴルフクラブヘッド |
JP7084634B2 (ja) * | 2019-12-20 | 2022-06-15 | 株式会社タナカ技研 | 、情報処理装置、端末装置、情報処理方法、およびプログラム |
-
2003
- 2003-07-14 JP JP2003196530A patent/JP4350443B2/ja not_active Expired - Lifetime
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2004
- 2004-06-04 WO PCT/JP2004/007830 patent/WO2005005676A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2935806B2 (ja) * | 1994-03-14 | 1999-08-16 | 株式会社日本製鋼所 | 水素貯蔵材料 |
JP2001348635A (ja) * | 2000-06-05 | 2001-12-18 | Nikkin Material:Kk | 冷間加工性と加工硬化に優れたチタン合金 |
JP2003320061A (ja) * | 2002-05-01 | 2003-11-11 | Sumitomo Rubber Ind Ltd | ウッド型ゴルフクラブヘッド |
JP7084634B2 (ja) * | 2019-12-20 | 2022-06-15 | 株式会社タナカ技研 | 、情報処理装置、端末装置、情報処理方法、およびプログラム |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018181937A1 (ja) * | 2017-03-31 | 2018-10-04 | 日本発條株式会社 | チタン合金素材 |
JPWO2018181937A1 (ja) * | 2017-03-31 | 2019-12-12 | 日本発條株式会社 | チタン合金素材 |
CN110284020A (zh) * | 2019-07-08 | 2019-09-27 | 东南大学 | 一种耐腐蚀高塑性钛基复合材料及其制备方法 |
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Publication number | Publication date |
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JP4350443B2 (ja) | 2009-10-21 |
JP2005029845A (ja) | 2005-02-03 |
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