Figure 4 Al-Cu phase diagram; shows the phase diagram for part of the aluminium–copper alloy system. 800 700 600 500 400 300 liquid ? + liquid solid ? ? + CuAl2 ? + liquid ? (CuAl2) intermediate compound Temperature (°C) Composition (% copper) 0 10 20 30 40 50 100 90 80 70 60 50 Composition (% aluminium) Figure 4 Figure for Question 8 Describe in one or two sentences the intermediate compound CuAl2 and explain why it appears in its pure form on the phase diagram in a very narrow band.
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- The intermediate compound CuAl₂ is labeled as "θ (CuAl₂)" on the phase diagram. Show more…
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Figure 4: Al-Cu phase diagram; shows the phase diagram for part of the aluminum-copper alloy system. Describe in one or two sentences the intermediate compound CuAl2 and explain why it appears in its pure form on the phase diagram in a very narrow band.
Adi S.
The figure below shows a phase diagram of the Cu-Ni (binary) system. An alloy composition of 70 wt. % Ni and 30 wt.% Cu is slowly heated from a temperature of 1300 °C (2370 °F). Answer the following questions: a) At what temperature does the first liquid phase form? b) What is the composition of the liquid phase? c) At what temperature does complete melting of the alloy occur? d) What is the composition of the last solid remaining prior to complete melting?
The copper-silver phase diagram is shown in FIGURE Q2. a. A copper-silver alloy with a composition of 30 wt% Ag and 70 wt% Cu is cooled down from 1000 °C to 600 °C. Determine at what temperature the first solid nuclei start to appear and at what temperature the alloy is completely solidified. [5 marks] b. Determine the phases present and then calculate the composition and mass fraction of each phase at 700 °C. [10 marks] FIGURE Q2: The copper-silver phase diagram
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