Fe-B-C system is a well-known alloy system for a liquid phase sintering (LPS), but a continuous network of hard and brittle solidified phases formed along the grain boundary is detrimental to the mechanical properties. For the improvement of ductile property, molybdenum (Mo) was introduced in Fe-B-C alloy system to modify the grain boundary microstructure through the formation of two Fe-Mo-B and Fe-B-C eutectic phases. For this, Fe-xMo-0.4B-0.8C (x = 1.0–5.0 in wt%) alloys were prepared by LPS and their microstructure and mechanical properties were investigated. With Mo addition, the matrix grain changed from pearlite and re-precipitated ferrite to pearlite (or pearlite/bainite) and the grain boundary changed from a continuous network to a lamella structure composed of MoFe(C,B) (WCoB-type boride) and (Fe,Mo)₃(C,B) (Fe₃C-type carbide). As a result of microstructure modification, the mechanical properties such as hardness, tensile strength, and elongation to failure were significantly improved. In particular, Fe-5Mo-0.4B-0.8C alloy exhibited a high tensile strength of 674 MPa and a high elongation to failure of 4.92%.

Fe-BC系统是用于液相烧结（LPS）的公知合金系统，但是沿晶界形成的硬质和脆性凝固相的连续网络不利于机械性能。为了改善塑性，在Fe-BC合金体系中引入了钼（Mo），通过形成两个Fe-Mo-B和Fe-BC共晶相来改变晶界的微观结构。为此，通过LPS制备了Fe-xMo-0.4B-0.8C（x = 1.0-5.0 wt％）合金，并研究了它们的微观结构和力学性能。添加钼后，基体晶粒从珠光体和再沉淀的铁素体变为珠光体（或珠光体/贝氏体），晶界从连续网络变为由MoFe（C，B）（WCoB型硼化物）组成的薄片结构。和（Fe，Mo）₃（C，B）（Fe ₃ C型碳化物）。由于微结构的改变，诸如硬度，抗张强度和断裂伸长率的机械性能得到显着改善。特别地，Fe-5Mo-0.4B-0.8C合金表现出674MPa的高拉伸强度和4.92％的高断裂伸长率。