Multilayered interface in Ti/Macor (R) machinable glass-ceramic joints

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Guedes, A (Author) Other; Pinto, AMP (Author) Other; Vieira, M (Author) FEUP; Viana, F (Author) FEUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Vol. 301

Pages: 118-124

ISSN: 0921-5093

Indexing

ISI Web of Knowledge - 23 Citations

Scopus - 28 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-000-W2F

DOI: 10.1016/s0921-5093(00)01804-9

Abstract (EN): Macor(R) machinable glass-ceramic and commercially pure (cp.) titanium were joined by active metal brazing, using a 64Ag-34.5Cu-1.5Ti (wt.%) filler alloy. The influence of the brazing temperature and holding stage on the microstructure and hardness profile of the interface, as well as on the shear strength of the joint, were assessed. Brazing was performed in a high vacuum furnace at 850, 890 and 930 degreesC for 10 and 30 min. The reaction between the braze alloy and both materials led to the formation of a multilayered interface. The interfacial microstructure was analysed in a scanning electronic microscope (SEM) and the composition of each reaction layer was investigated by energy dispersive X-ray scans (EDS). The interfacial hardness profile was determined by a series of microhardness tests on each reaction layer. The mechanical strength of the joint was assessed from shear tests conducted at room temperature. Brazing at 850 degreesC with a 10 min holding stage produced stronger joints, with an average shear strength of more than 85% of the glass-ceramic bulk strength.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7