TH102715A - The process of synthesis of iron or iron aluminide composites. With titanium diboride and aluminum oxide reinforcement - Google Patents

Abstract

DC60 (12/11/52) This invention describes the process of synthesizing composite materials of iron or iron aluminide binder with titanium diboride and aluminum oxide reinforcers, which can be produced in a single step by a high-temperature spontaneous progressive reaction using ilmenite powder, boron oxide powder, and aluminum powder as precursors. The steps are as follows: (a) Preparation of the ilmenite/boron oxide/aluminum composite powder by mixing ilmenite powder with boron oxide powder and aluminum powder; (b) Molding the composite powder into a starting material with a density between 50-70% of the theoretical density; (c) Ignition of the reaction at the surface of the starting material with a heating wire under an inert gas atmosphere to induce a spontaneous reaction after ignition. The synthesis process allows for adjustment of the precursor proportions according to the molar ratio. This invention describes a process for synthesizing Fe-TiB2-AI2O3, FeAl-TiB2-Al2O3, or Fe3Al-TiB2-AI2O3 composites in a single production step. The process involves synthesizing a composite of iron or iron aluminide binder with titanium diboride and aluminum oxide reinforcer, which can be produced in a single step via a high-temperature spontaneous progressive reaction using ilmenite powder, boron oxide powder, and aluminum powder as precursors. The steps are as follows: (a) preparation of the ilmenite/boron oxide/aluminum composite by mixing ilmenite powder with boron oxide and aluminum powder; (b) molding the composite into a starting material with a density between -70% of the theoretical density; and (c) initiating the reaction at the surface of the starting material with a heating wire under an inert gas atmosphere, allowing for a spontaneous reaction after ignition. The precursor ratios can be adjusted according to the molar ratio. This allows for the synthesis of Fe-TiB2-Al2O3, FeAl-TiB2-Al2O3, or Fe3Al-TiB2-Al2O3 composite materials in a single production step.

Claims (7)

1. The synthesis process of composite materials using iron or iron-alumide binder with titanium diboride and aluminum oxide reinforcers involves the following steps: 1.1. Preparation of the ilmenite/boron oxide/aluminum composite powder by mixing ilmenite mineral powder (FeTiO3) with boron oxide powder (B2O3) and aluminum powder (Al). 1.2. Molding the composite powder into starting materials with a density between 50-70% of the theoretical density. 1.3. Ignition of the reaction at the surface of the starting material using a heating wire under an inert gas atmosphere to allow the reaction to proceed spontaneously after ignition. 2. The synthesis process described in Claim 1, after step (1.1), yields a uniform mixture with a particle size of approximately < 10 µm. 3. The synthesis process described in Claim 1 involves an inert gas, namely argon or nitrogen gas. 4. The synthesis process described in Claim 1, which uses a heating wire of either tungsten (W) or nichrome. 5. The synthesis process described in claim 1, with a molar ratio of ilmenite/boron oxide/aluminum of 1/1/4 mol, is used to synthesize a composite material of Fe-TiB2-Al2O3. 6. The synthesis process described in claim 1, with a molar ratio of ilmenite/boron oxide/aluminum of 1/1/5 mol, is used to synthesize a FeAl-TiB2-Al2O3 composite material. 7. The synthesis process described in claim 1, with a molar ratio of ilmenite/boron oxide/aluminum of 3/3/13 mol, is used to synthesize a composite material of Fe3A-TiB2-Al2O3.