Hardness and microstructure of Ti-15Mo-5Zr-3Al alloy for dental casting

• Published in: Acta odontologica Scandinavica Vol. 69; no. 6; p. 328
• Main Authors: Kochi, Mamiko, Koizumi, Hiroyasu, Murakami, Mahoko, Kikuchi, Hisaji, Matsumura, Hideo, Yoneyama, Takayuki
• Format: Journal Article
• Language: English
• Published: England 01.11.2011
• Subjects: Biocompatible Materials - chemistry; Crystallization; Dental Alloys - chemistry; Dental Casting Investment - chemistry; Dental Casting Technique - instrumentation; Dental Materials - chemistry; Hardness; Humans; Materials Testing; Microscopy; Oxides - chemistry; Surface Properties; Titanium - chemistry; X-Ray Diffraction
• ISSN: 1502-3850
• DOI: 10.3109/00016357.2011.568963

The hardness and microstructures of Ti-15Mo-5Zr-3Al alloy castings were investigated for application to dental cast prostheses. Cast specimens of Ti-15Mo-5Zr-3Al alloy, Ti-6Al-7Nb alloy and CP Ti were prepared using a centrifugal-type casting machine and a magnesia-based investment material. The hardness of the cross-sections of the cast specimens were measured. The microstructure of the castings was observed using an optical microscope and was then analyzed by X-ray diffractometry. The hardness of Ti-15Mo-5Zr-3Al alloy at the inner part of the castings was 361 Hv, while the hardnesses of Ti-6Al-7Nb alloy and CP Ti were 384 and 269 Hv, respectively. The thickness of the surface hardened layer for Ti-15Mo-5Zr-3Al alloy was thinner than those for Ti-6Al-7Nb alloy and CP Ti. The microstructure of the Ti-15Mo-5Zr-3Al alloy casting was confirmed to be β phase.