Titanium-uranium system in the region 0 to 30 atomic percent of titanium

Abstract

The tentative t itanium-uranium phase diagram has been amplified by thermal, microscopic, and X-ray analyses of a lloys in the range 0 to 30 atomic percent of titanium. The system is characterized by a peritectic reaction which occurs at 1,180 0 C, and by two solidsolu tion phases which decompose eutectoidly, one at 718 0 C and 5 atomic percent of titanium, the other at 830 0 C and 18.3 atomic percent of titanium. The alpha-beta transformation in uranium is increased from 657 0 to 667 0 C by titanium and the beta-gamma transformation is lowered from 768 0 to 718 0 C.

Calphad thermodynamic description of some binary systems involving U

“…However she used lattice stabilities incompatible with SGTE and this cannot be used in the Fuelbase project. During the present reassessment, the experimental phase diagram determined by Buzzard and coworkers [13] are not considered as it is inconsistent with other works due to important contamination but the other experimental phase diagrams previously assessed by Murray [14][15][16][17] as well as the work by Linard [18] that she seems not to have been aware about, all in reasonable agreement. Most of these experimental results are shown on Fig.…”

Uranium-platinum system

“…To avoid this, alloys for subsequent heat treatment were wrapped in molybdenum sheet prior to sealing in the silica tubing; no molybdenum contamination was detected by chemical tests. The homogenized specimens were subsequently sealed individually in silica tubing, reheated to selected temperatures, and quenched in ice water, using the nickel-block technique [ 5 ]. Quenching temperatures were measured with a Pt versus Pt–10 percent Rh thermocouple, previously calibrated against a standard thermocouple, which under the experimental conditions was accurate to ±2° C. In determining the solubility of platinum in uranium, the specimens were heated into the gamma range, then cooled to the desired temperature, and quenched.…”

Thermodynamic Evaluation and Assessment of the Ti-U Binary System

“…The experimental data of Ti-U system. Buzzard et al [1] examined alloys in the range 0 to 30 at.% titanium by thermal analysis, microscopic examination, and X-ray methods. Their results show a peritectic reaction which occurs at 1180 ℃ , and two solid solution phases which decompose eutectoidally, one at 718℃ and 5 at.% titanium, the other at 830℃ and 18.3 at.% titanium.…”