Ｔｉ‐Ｚｒ基ろうを用いた超高純度アルミナとチタンのろう付性

• 恩沢 忠男

  東京工業大学工学部

• 鈴村 暁男

  東京工業大学工学部

• 高 明玩

  東京工学大学大学院

書誌事項

タイトル別名

• Brazeability of high purity alumina to titanium using Ti-Zr base filler metals.

抄録

Brazeability of high purity alumina (99.9 wt% Al2O3) to commercially pure titanium (CP Ti) and Ti-6A1-4V alloy with Ti-Zr base filler metals has been investigated by microscopy, EDX microanalysis, X-ray diffraction, and shear test of the joints. Filler metals used were two types of amorphous foils, developed for trial, of 25Ti-25Zr-5OCu (Type 5000) and 37.5Ti-37.5Zr-l5Cu-lONi (Type 1510), whose melting points were about 815°C and were apploximately 100°C lower than those of conventional Ti-base fillers.<BR>Shear strength of joints brazed with Type 5000 filler metal had a tendency to decrease with increase in both brazing temperature and time. However, in case of brazing at comparatively low temperature for a short time using Type 5000 filler metal, it was possible to get sufficient joints having shear strength of above 150 MPa. Metallurgical test results showed that in the joint of alumina to CP Ti with Type 5000 filler metal, (Ti, Zr)₂Cu was formed at joint region nearby CP Ti base metal at the beginning of brazing, and that the composition of the region varied with increase in brazing time. A thin titanium and/or zirconium oxide layer was also detected at the interface between alumina and the joint region, and the growth of this oxide layer was related to the decrease in joint strength and to the occurrence of cracking at the joint.<BR>As for using Type 1510 filler metal, the joints were flaked during cooling after brazing, because of rapid formation of brittle Ti and Zr rich layer at the joint interface, which indicates that the brazeability of Type 1510 filler metal is fairly inferior to that of Type 5000 filler metal.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 7 (1), 124-129, 1989

  一般社団法人 溶接学会

キーワード

• Ceramics
• Joining
• Brazing
• Alumina
• Ti and Ti alloys
• Amorphous filler metals

詳細情報

• CRID: 1390282679699998208
• NII論文ID: 130003764832
• DOI: 10.2207/qjjws.7.124
• ISSN: 24348252
• ISSN: 02884771
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可