| Project/Area Number |
10671819
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
補綴理工系歯学
|
|---|
| Research Institution | Tokyo Medical and Dental University |
|---|
Principal Investigator |
WAKABAYASHI Noriyuki Tokyo Medical & Dental Univ., Faculty of Dentistry, Research Associate, 歯学部, 病院助手 (00270918)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SONEDA Kenji Tokyo Medical & Dental Univ., Faculty of Dentistry, Research Associate, 歯学部, 助手 (10226714)
MIZUTANI Hiroshi Tokyo Medical & Dental Univ., Faculty of Dentistry, Assistant Professor, 歯学部, 助教授 (00014324)
|
|---|
| Project Period (FY) |
1999 – 2000
|
| Project Status |
Completed (Fiscal Year 1999)
|
| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
|
|---|
| Keywords | Dental alloy / Denture base / Adhesive resin / Titanium alloy / Infrared brazing |
|---|
| Research Abstract |
This study investigated the area size of the flow of a gold braze alloy on commercially pure titanium and Ti-6Al-4V alloy plates, and elemental composition at the interface was determined. In the second part of this study the tensile strengths of titanium plates brazed using a gold alloy were investigated. Chips of Type IV gold alloy and silver braze alloys were melted onto commercially pure titanium and Ti-6Al-4V surfaces in a dental infrared radiation unit. Flow area of each braze alloy was measured using a digital image analyzer. Tensile specimens (n=5) were also prepared by infrared brazing using the braze alloys. Five specimens for each combination of the two titanium plates and the two braze alloys were subjected to tensile loading using a Universal testing machine. Electronprobe microanalysis of x-rays (EPMA) at cross section of the brazed joints to determine elemental composition across the interface, as well as SEM observation at the fracture surfaces, were also conducted. The braze alloys flowed well and spread over the Ti and Ti-6Al-4V plates. Braze alloy type significantly influenced flow, and the gold alloy flowed less on the titanium materials. The mean tensile strengths of Ti and Ti-6Al-4V plates brazed using the gold braze alloy were 219 MPa and 417 MPa, respectively. The fracture surfaces of Ti-6Al-4V specimens with the gold braze alloy exhibited typical ductile behavior. Ti with the same braze alloy showed brittle surfaces. A greater concentration of Cu was found at the Ti with gold braze interface. The flow and the tensile strength of the gold alloy coating on titanium surface by means of an infrared brazing is adequate for dental use.
|
