A kind of preparation method of high temperature metal surface anti-high temperature oxidation radiant heat protective coating
A technology for anti-high temperature oxidation and metal surface, which is applied in the direction of surface reaction electrolytic coating, metal material coating process, coating, etc., can solve the problem of low emissivity of metal surface, poor protection ability of high temperature radiation heat dissipation, poor erosion resistance, etc. problems, to achieve the effect of improving high temperature oxidation resistance, uniform and controllable thickness, and good bonding performance
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Embodiment 1
[0030] The metal substrate is Nb-10Hf-1Zr (brand C103), and the specific operation steps are:
[0031] Step 1: Prepare Si infiltration layer by high temperature chemical infiltration method: 1. Polish the surface of Nb-10Hf-1Zr substrate with 800# SiC sandpaper, remove surface oxide scale and dirt, and clean; 2. Preparation of infiltration agent: 16wt% Si , 5wt% NaF and 5wt% Y 2 o 5 , and the balance Al 2 o 3 powder. Ball mill for 4 hours after configuration; 3. Completely embed the cleaned workpiece in a container with infiltration agent, seal it and place it in a high-temperature chemical infiltration furnace; 4. Introduce high-purity argon into the furnace to Raise the temperature of the furnace to 1300°C at a rate of °C / min, keep the temperature for 8 hours, then cool down to room temperature with the furnace, take out the workpiece, and clean it to obtain a 90 μm Si-infiltrated oxygen barrier transition layer.
[0032] Step 2: In-situ generation of micro-arc oxidatio...
Embodiment 2
[0037] The metal matrix is made of SiC reinforced Nb alloy composite material, and the specific operation steps are as follows:
[0038] Step 1: Preparation of Si infiltration layer by high-temperature chemical infiltration method: 1. Polish the surface of the substrate with 800# SiC sandpaper, remove surface scale and dirt, and clean; 2. Preparation of infiltration agent: 16wt% Si, 5wt% NH 4 Cl, 5wt% CeO 2 and the balance Al 2 o 3 Powder, after ball milling for 4 hours; 3. After the cleaned workpiece is completely buried in the container containing the infiltration agent, seal it and place it in a high-temperature chemical infiltration furnace; 4. Introduce high-purity argon into the furnace, Raise the temperature in the furnace to 1300°C at a rate of 8°C / min. After holding the temperature for 8 hours, cool down to room temperature with the furnace, take out the workpiece, and clean it to obtain a Si-infiltrated oxygen barrier layer with a thickness of 220 μm.
[0039] S...
Embodiment 3
[0044] The metal substrate is 73Ni-15Cr-Ti, Al (brand Inconel 600), and the specific operation steps are:
[0045] Step 1: Prepare the Al infiltration layer by high temperature chemical infiltration method: 1. Polish the surface of the substrate with 800#SiC sandpaper, remove the surface scale and clean it; 2. Preparation of infiltration agent: its weight percentage is: 16wt% Al, 5wt %NaF, 10wt%Y 2 o 3 and 5wt% CeO 2 and the balance Al 2 o 3 Powder, ball milled for 4 hours after preparation; 3. Completely embed the cleaned workpiece in a container with infiltration agent, seal it and place it in a high-temperature chemical infiltration furnace; 4. Introduce high-purity argon into the furnace, The temperature of the furnace was raised to 1000°C at a rate of 8°C / min, and after holding for 8 hours, it was cooled to room temperature with the furnace to obtain an Al-impregnated oxygen barrier layer with a thickness of 80 μm.
[0046] Step 2: Prepare micro-arc oxidation coating...
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