Abstract

The phase diagram of the Ag–Ga binary system and the phase relations of the Ag–Ga–N system are studied by DTA and X-ray powder diffraction. The equilibrium phase diagram of the Ag–Ga system is reconstructed. Two intermetallic phases are determined in the Ag–Ga system: the Ag 2Ga compound and a novel δ-Ag 3Ga 2 with the composition about 40 at.% Ga. The novel phase δ-Ag 3Ga 2 which is the product of the peritectic reaction Ag 2Ga + L ↔ δ-Ag 3Ga 2 at 575 K is indexed with an orthorhomic lattice with lattice parameters a = 6.7276(2) Å, b = 3.8840(1) Å, c = 3.2200(1) Å and V = 84.14 Å 3. The temperature-dependent lattice parameters of ζ′-Ag 2Ga with 28 at.% Ga are measured by temperature-dependent X-ray powder diffraction from 93 to 543 K. The linear temperature dependences of the expansion coefficients along the direction of a- and c-axis and volume coefficients are obtained, α a = (1.4741 + 0.0028 T) × 10 −5, α c = (1.1710 + 9.1349 × 10 −4 T) × 10 −5 and α V = (4.1167 + 0.0065 T) × 10 −5, respectively. No ternary phase is found in the Ag–Ga–N system and no solubility of Ag in GaN is observed under the present experimental conditions.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.