Metal glass composite material with high-oxygen content and preparation method thereof
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A composite material and metal glass technology, applied in the field of metal matrix composite materials, can solve problems such as reducing strength
Inactive Publication Date: 2014-06-11
NANJING UNIV OF SCI & TECH
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However, the acquisition of the plasticity of the above-mentioned metallic glass composite material greatly reduces the strength
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[0022] A kind of metal glass composite material with high oxygen content of the present invention, its preparation method comprises the following steps:
[0023] The first step: select the alloy elements with a purity greater than 99.5%, and make a ratio according to the predetermined composition, and first mix Zr and ZrO in a pure argon atmosphere electric arc furnace 2 、TiO 2 One or several of CuO or BeO are mixed and smelted evenly, or low-purity high-oxygen sponge zirconium and sponge titanium raw materials are used for melting in low vacuum, and then other elements are added to melt together to make the alloy composition homogeneous , Suction casting into master alloy profiles.
[0024] Step 2: Put the master alloy profile into the crucible, heat it in a resistance furnace until it is completely melted, and perform overheating treatment to melt the impurity phase.
[0025] Step 3: Adjust the power of the resistance furnace, lower the temperature to the solid-liquid two-...
Embodiment 1
[0040] (1) Selection of raw materials
[0041] The purity of each metal component that the present invention prepares master alloy ingot for selection is as table 1, and alloy composition is Zr 54 Ti 13 Nb 5 Cu 5 Ni 4 be 9 o 10 (atomic percent).
[0042] Table 1 The purity (%) of metal components selected for the preparation of master alloy ingots
[0043] alloy element Zr Ti Nb Cu Ni be ZrO 2 purity / % 99.5 99.5 99.9 99.9 99.9 99..5 99.9
[0044] (2) Preparation of master alloy ingot
[0045] Under the conditions of Ti inhalation and high-purity argon protection, master alloy buckle ingots are melted in a non-consumable arc melting furnace. The specific procedures are as follows:
[0046]a. After mechanically grinding the surface of the metal raw material to remove the oxide skin on the surface, prepare the material according to the designed composition ratio; put the prepared material into the water-cooled copper crucible in t...
Embodiment 2
[0058] Adopt the method identical with embodiment 1, alloy composition is Zr 34.7 Ti 34.7 Nb 10.6 Cu 6.0 be 12.0 o 2.0 (atomic percent). The composite sample with a diameter of 30mm prepared at a pulling rate of 2mm / s has a uniform structure, and the tensile strength and plastic strain reach 1300MPa and 9%, respectively.
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Abstract
The invention discloses a metal glass composite material with high-oxygen content and a preparation method thereof. The expression of the atomic ratio of the material is Zr[a]Ti[b]M[c]Cu[d]Ni[e]Be[f]O[g], wherein M is one of niobium (Nb), vanadium (V) or hydrogen fluoride (Hf), a is larger than or equal to 10 and smaller than or equal to 70, b is larger than or equal to 10 and smaller than or equal to 70, c is larger than or equal to 4 and smaller than or equal to 15, d is larger than or equal to 2 and smaller than or equal to 12, e is larger than or equal to 0 and smaller than or equal to 10, f is larger than or equal to 5 and smaller than or equal to 15, g is larger than 0 and smaller than or equal to 15, and a plus b plus c plus d plus e plus f plus g equals 100. The preparation method includes the steps of smelting master alloy ingots, casting master alloy profile, placing the master alloy profile into a crucible to heat and smelt, carrying out overheating treatment melting impurities, lowering temperatures to solid and liquid two-phase region, carrying out semi-solid treatment so that oxygen elements segregate and are solute in separated beta- zirconium (Zr) or beta- titanium (Ti) in a solid mode, controlling the shape and size of the separated solid and liquid, carrying out semi-solid progressive solidification to form the large-size metal glass composite material of high strength and high toughness. The large size of 30 millimeters metal glass composite material of the high strength and the high toughness with is prepared, and is remarkable in processing solidification property and good in tensile strength and plasticity.
Description
technical field [0001] The invention belongs to the technical field of metal-matrix composite materials. Specifically, through reasonable composition and process design, oxygen elements are segregated and solid-dissolved in the pre-precipitated β-Zr or β-Ti to produce solid-solution strengthening, thereby realizing metallic glass The combination of strength and plasticity of composite materials produces a high-strength and high-toughness metallic glass composite material. Background technique [0002] Bulk metallic glass (BMG) has a series of excellent mechanical properties different from traditional crystalline alloys, such as high strength, high hardness, low elastic modulus and large elastic strain limit, making it considered as a very potential structural material . However, the highly localized shear behavior allows BMG materials to undergo catastrophic fracture in the form of sudden failure without obvious room temperature macroscopic plastic deformation, which severe...
Claims
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