- Title
- In-situ neutron diffraction of titanium silicide, Ti₅Si₃, during self-propagating high-temperature synthesis (SHS)
- Creator
- Riley, D. P.; Oliver, C. P.; Kisi, E. H.
- Relation
- Intermetallics Vol. 14, Issue 1, p. 33-38
- Publisher Link
- http://dx.doi.org/10.1016/j.intermet.2005.04.004
- Publisher
- Elsevier Ltd.
- Resource Type
- journal article
- Date
- 2006
- Description
- Self-propagating high-temperature synthesis (SHS) has potential for the efficient production of high melting temperature intermetallics such as Ti₅Si₃. However, the process is poorly understood due to the difficulty of making in situ observations. In this research, the self-propagating synthesis of Ti₅Si₃ from furnace ignited elemental samples was studied using high-speed in situ neutron powder diffraction. Diffraction patterns were recorded at 0.9 s time-resolution during heating at >100 K/s. Despite the existence of four other titanium silicides (TiSi₂, TiSi, Ti₅Si₄, Ti₃Si) evidence of these or other intermediate phases was not found in either the pre-heating or reaction stages of the process. The reaction is, however, narrowly preceded by the α→β transformation in Ti, which initiates interdiffusion and acts as a trigger for SHS ignition. The formation of Ti₅Si₃ appears to occur by the direct solid state reaction of β-Ti and Si.
- Subject
- titanium silicides; phase transformation mechanisms; reaction synthesis; diffraction (electron, neutron and X-ray)
- Identifier
- http://hdl.handle.net/1959.13/33977
- Identifier
- uon:3434
- Identifier
- ISSN:0966-9795
- Language
- eng
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