METHOD 2 (1 part preparation)
(adapted from The Socachim Handbook of Fusion Methods)

For Phoenix Fusion Machines

Introduction

Direct fusion of ferro-alloys in molten borate flux is not possible as ferro-alloys will not readily dissolve and they attack and destroy the crucible metal. This method outlines how preparation can be carried out in a single step. The method is suitable for the following ferro-alloys: Ferro-Tungsten; Ferro-Vanadium; Ferro-Molybdenum; Ferro-Manganese and Ferro-Silicium

Materials

Flux XRF Scientific LT100, LT66:LM34 and LT50:LM50
Flux additives
Oxidizer Mix Lithium carbonate:Sodium Carbonate:Potassium Nitrate (1:1:1)
Non-wetting agent 2 drops Lithium Bromide (250g/L)

Method

1. Weigh 4g of the lithium borate flux and introduce the flux into the crucible
2. Weigh and mix 0.3g of dried and ground sample (particle size <80 μm) with 1.0g Lithim Borate flux and 2.25 Oxidizer mix. Mix rigorously to ensure contact between sample, and oxidizer mix is optimal. Transfer to crucible.
3. Add 2 drops of Lithium Bromide to the mixture in the crucible.
4. Start the fusion program outlined below
5. When cooling is complete, remove the bead form the mould
Dilution
The final sample/flux/oxidizer ratio is about 0.3/9/2.25

Fusion program

Premelt, 850°C 7 minutes
Melting, without swirling, 1200°C-1250°C# 3 minutes
Melting, with swirling, 1200°C-1250°C# 4 minutes
Mould control (mould preheating), 1150°C 2 minutes
Cooling (bi-level) Temperature 1 1 minute
Cooling (bi-level) Temperature 2 2 minutes

Variation for Ferro-chromium

Dilution

The final sample/flux/oxidizer ratio is about 0.3/9/2.25