http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 大川昭治 (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Ti-Ni-Cu 납을 이용한 티타늄 납접부의 인장 및 피로강도
최규형,원대희,배태성,大川昭治,亘理文夫 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4
This study was performed to evaluate the tensile and fatigue strength of butt joints in titanium soldered with Ti-Ni-Cu alloy. Titanium rods of 30 mm in length and 3 mm in diameter were divided into two groups and the soldering surfaces were polished with #240 and #2,000 emery paper, respectively. Tow pieces of titanium rods were butt-soldered with Ti-Cu-Ni alloy using the electric resistance heating under flux-argon atmosphere, the infrared heating under argon atmosphere, and the infrared heating under vacuum-argon substitution atmosphere. Tensile test was done with a crosshead speed of 0.5㎜/min using universal testing machine and fatigue test was performed by a cyclic tensile stress of 30 Hz using tension-type fatigue testing machine. The solder-matrix interface regions were etched by the solution of 20HF-20HNO_3-60glycerin and analyzed by EPMA. The fracture surfaces were examined by SEM. The maximum tensile strength value of 391.0±19.9 MP_a was obtained when the titanium surfaces were polished with #2,000 emery paper and soldered with Ti-Ni-Cu alloy using the infrared heating under vacuum-argon substitution atmosphere. Fatigue strength value of 215.8 MPa was obtained when soldered using the infrared heating under vaccum-argon substitution atmosphere. Characteristic striation and dimple regions were observed in the fractured surfaces. The EPMA data for the solder-matrix interface region revealed that the diffusion of Ni and Cu occurred in the titanium matirx.
-
14K 금합금과 Ti-Ni-Cu 합금의 납재를 이용한 티타늄 납접부의 인장 및 피로강도
김태조,최진용,원대희,배태성,亘理文夫,大川昭治 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.3
This study was performed to evaluate the tensile and fatigue strengths of butt joints in titanium soldered with 14K gold and Ti-Ni-Cu alloys. Titanium rods. 30㎜ in length and 3㎜ in dimeter, were polished with #2,000 emery paper and soldered using the electric resistance heating and the infrared radiation heating devices. Tensile test was done with a crosshead speed of 0.5㎜/min, and fatigue test was subjected to a cyclic tensile stress of 30 Hz using tension-type fatigue machine. The solder-matrix interface region and the fracture surfaces were examined by scanning electron microscope. The results obtained were summarized as follows; 1. Mean tensile strength and fatigue strength values of 394.2 MPa and 189.2 MPa were obtained at the joint soldered with 14K gold alloy using the electric resistance heating device. 2. Mean tensile strength and fatigue strength values of 385.2 MPa and 191.2 MPa were obtained at the joint soldered with Ti-Ni-Cu alloy using infrared radiation heating device. 3. Many gas and shrinkage porosities were observed in the both solder joints. 4. partially oxidized surfaces and characteristic striations were observed in the fractured surfaces of the both solder joints.
RISS
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
