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Vieira, Manuel
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Publications (7/7 displayed)
- 2024Promoting Sustainability in the Cement Industry: Evaluating the Potential of Portuguese Calcined Clays as Clinker Substitutes for Sustainable Cement Production
- 2023A Review on Direct Laser Deposition of Inconel 625 and Inconel 625-Based Composites-Challenges and Prospectscitations
- 2023Upcycling Aluminium Chips to Powder Feedstocks for Powder Metallurgy Applicationscitations
- 2023Additively Manufactured High-Strength Aluminum Alloys: A Reviewcitations
- 2022Ball Milled Al Spheres for the Manufacturing of Casting-Based Al-CNT Composites
- 2021Effects of CNTs addition on the microstructure and microhardness of stainless steel alloy/carbon-manganese non-alloyed steel weldingcitations
- 2001Multilayered interface in Ti/Macor (R) machinable glass-ceramic jointscitations
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article
Multilayered interface in Ti/Macor (R) machinable glass-ceramic joints
Abstract
Macor® 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°C 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°C with a 10 min holding stage produced stronger joints, with an average shear strength of more than 85% of the glass-ceramic bulk strength.