Method of producing biodegradable magnesium composite by spark plasma sintering

A method of making a biodegradable magnesium metal composite, the method comprising:

• milling a solid mixture of magnesium powder and TiB2 powder to form a milled powder;
• and
• spark plasma sintering the milled powder to form the biodegradable magnesium metal composite,
• wherein the biodegradable magnesium metal composite comprises a polycrystalline magnesium matrix and 0.5 to 5.0 wt. % TiB2 grains which are homogenously distributed in the polycrystalline magnesium matrix, at least 99 wt. % of the total weight of the biodegradable magnesium metal composite is the polycrystalline magnesium matrix and the TiB2 grains,
• wherein the TiB2 grains have a mean grain size of 20 to 50 μm and the polycrystalline magnesium matrix is in the form of a polycrystalline matrix of magnesium grains having a mean grain size of 20 to 50 μm,
• wherein the biodegradable magnesium metal composite has a microhardness in a range of from 40 to 65 HV, and a macrohardness in a range of from 36 to 65 HV.