Manufacturing method of multilayer shell-core composite structural part
A composite structure, multi-layer shell technology, applied in the direction of chemical instruments and methods, layered products, ceramic layered products, etc., can solve the problem of inability to obtain multi-layer shell-core composite structure parts, inability to organize, precise control of performance, and mechanical bearing Good capacity and other issues, to achieve the effect of good long-lasting stability, strong impact load capacity, and strong mechanical bearing capacity
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Embodiment 1
[0038] A femoral head with a multilayer shell-core composite structure, which is composed of a high-purity ultrafine alumina ceramic spherical shell layer 1, an alumina-based (niobium) cermet middle layer 5 (i.e. transition layer) and a niobium metal inner core 2. The composite structure of multilayer tissue has such Figure 1 to Figure 5 The five forms shown can be selected according to the application requirements.
[0039] see Figure 6 , the specific preparation process is:
[0040] (1) Prepare high-purity ultrafine alumina powder, alumina-based (niobium) cermet composite powder and niobium metal powder injection molding feedstock respectively. The purity of the high-purity ultrafine aluminum oxide powder is greater than 99.9 wt%, and the particle size is 0.5-10 μm; the purity of the niobium metal powder is greater than 99.8 wt%, and the particle size is 0.5-10 μm. In order to reduce the sintering temperature and improve the sintering performance, 0.25wt.% MgO powder is ...
Embodiment 2
[0048] A multi-layer shell-core composite structure femoral head, which is made of high-purity ultra-fine alumina ceramic spherical shell layer 1, ZrO 2 (3Y 2 o 3 )-80wt.%Al 2 o 3 Toughened ceramic interlayer 5 and ZrO 2 (3Y 2 o 3 )-20wt.%Al 2 o 3 Toughened ceramic core 2 consists of three parts.
[0049] see Figure 6 , the specific preparation process is:
[0050] (1) Prepare high-purity ultra-fine alumina powder, ZrO 2 (3Y 2 o 3 )-80wt.%Al 2 o 3 Composite powder and ZrO 2 (3Y 2 o 3 )-20wt.%Al 2 o 3 Composite powder injection molding feed. The purity of high-purity ultra-fine alumina powder is greater than 99.9wt%, and the particle size is 0.5-10 μm; ZrO 2 The purity of the powder is greater than 99.8 wt%, and the particle size is 0.5-10 μm. In order to reduce the sintering temperature and improve the sintering performance, 0.25wt.% MgO powder is added to the high-purity ultrafine alumina powder as a sintering aid. Prepared modified alumina powder, ZrO...
Embodiment 3
[0058] A femoral condyle prosthesis (one of artificial knee joint components) with a multi-layer shell-core composite structure, consisting of Ti6Al4V core layer 1, Ti6Al4V-20vol.%Al 2 o 3 Transition layer 2, Ti6Al4V-60vol.%Al 2 o 3 Transition layer 3 and high-purity ultra-fine Al 2 o 3 The ceramic shell layer 4 is composed.
[0059] see Figure 6 , the specific preparation process is:
[0060] (1) Separately prepare high-purity ultra-fine Al 2 o 3 Powder, Ti6Al4V-60vol.%Al 2 o 3 Composite powder, Ti6Al4V-20vol.%Al 2 o 3 Composite powder and Ti6Al4V powder injection molding feedstock. High-purity ultra-fine Al 2 o 3 The purity of the powder is greater than 99.9wt%, and the particle size is 0.5-5μm; the purity of the Ti6Al4V powder is greater than 99.5wt%, and the particle size is 10-35μm. In order to reduce the sintering temperature and improve the sintering performance in high-purity ultra-fine Al 2 o 3 Add 0.1wt.% MgO powder to the powder as a sintering aid....
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