INGE 5005 – 2 nd Semester 2014-2015 Name : Student Number : Boron selenide is being used in advanced semiconducting detectors 1 . For the accompanying B 2 Se 3 -Se phase diagram, please respond to the following questions. a. Indicate the liquidus and solidus lines on the diagram. b. Indicate the melting points of B 2 Se 3 and Se. c. Label ALL regions (phase fields) in the diagram. d. For the composition 70 at.% Se-30 at. %Be: i. At 480ºC compute the chemical composition of the phases present and their relative amount (in %). ii. Do the same as (ii) for 200ºC and 89ºC. iii. Sketch the microstructure at those 3 temperatures indicating clearly the distribution of the phases. This sketch should reflect your answer to the prior request. 1 A. Kargar ; J. Tower ; L. Cirignano ; K. Shah; Boron selenide semiconductor detectors for thermal neutron counting. Proc. SPIE 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 88521M (September 26, 2013); doi:10.1117/12.2027078. If you need more space continue your work on the back of the paper 1 of 1
Boron selenide is being used in advanced semiconducting
detectors[footnoteRef:1]. For the accompanying B2Se3-Se phase
diagram, please respond to the following questions. [1: A. Kargar ;
J. Tower ; L. Cirignano ; K. Shah; Boron selenide semiconductor
detectors for thermal neutron counting. Proc. SPIE 8852, Hard
X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 88521M
(September 26, 2013); doi:10.1117/12.2027078.]
a. Indicate the liquidus and solidus lines on the diagram.b.
Indicate the melting points of B2Se3 and Se.c. Label ALL regions
(phase fields) in the diagram.d. For the composition 70 at.% Se-30
at. %Be:i. At 480C compute the chemical composition of the phases
present and their relative amount (in %).ii. Do the same as (ii)
for 200C and 89C.iii. Sketch the microstructure at those 3
temperatures indicating clearly the distribution of the phases.
This sketch should reflect your answer to the prior request.
If you need more space continue your work on the back of the
paper
