To avoid the losses of Ca and Ni during production ,what is the sequence, temperature and process to be followed.

the production of the CaNi system is seriously hampered by the low boiling point of calcium (16OO”C), which comes close to the melting point of nickel (1455°C). The melting together of these metals will therefore, in general, lead to large losses of calcium by evaporation. A further difficulty is the high oxidation rate of elementary calcium, especially at elevated temperatures.

How about the following steps?

1) Prepare Ca-21.5wt%Ni eutectic alloy by ball milling the required raw powders and melting. Melting temperature: 605 deg C.

2) Pulverize the alloy into powder

3) Next prepare Ni-6wt% Ca eutectic alloy by ball milling the Ca-21.5 Ni alloy powder and nickel powder followed by melting. The melting temperature of this alloy is 1160 deg C.

4) Use these two eutectic alloys to prepare other Ni--Ca alloys.

The above may work in lab scale, not sure about industrial scale.

Krishnan Raja thanks for the suggestion, I will work on the feasibility of the production by this way at industrial scale

one reference/patent state that-

melt a charge of electrolytic nickel in an induction furnace having a clay-graphite crucible (such as a No. 30 crucible sold under the Trademark DIXAGRAF and available from Joseph Dixon Crucible Company). The nickel was heated to about 1475° C. and pieces of metallic calcium wired to nickel rods were plunged beneath the surface of the melt. The molten alloy was poured into 4" diameter, tapered, cast-iron molds and allowed to cool to room temperature.

I would like to know the authenticity of this process at industrial level