MANUFACTURE OF AL-B ALLOY

PURPOSE:To obtain an Al-B alloy suitable for impurity removal of Al (alloy) in a conductive metallic layer or as wear-resisting or neutron-absorbing material, by holding a molten Al (alloy) metal at a temp. in a prescribed temp. range and by adding a borofluoride to form B into an AlB2 intermetallic compound. CONSTITUTION:The molten Al metal or Al alloy is held at 660-800 deg.C, to which borofluoride, preferably one kind among KBF4, NaeBF4 and LiBF4, is added. In this way, the presence of an inclusion AlB12 intermetallic compound is eliminated so as to form B into the AlB2 intermetallic compound. Or, by addition of a mixture of the above borofluoride and alkali-metal fluoride (for example, KF and/or NaF is suitably used), the AlB2 intermetallic compound is formed. In this manner, the Al-B alloy having the above characteristics can be obtained.