Method for strengthening interface bonding of GNPs/Ti composite by directionally growing TiBw
A composite material and directional growth technology, which is applied in the field of directional growth of TiBw to strengthen the interface bonding of GNPs/Ti composite materials, can solve problems such as optimizing the interface structure of GNPs/Ti composite materials, deteriorating the interface bonding characteristics of composite materials, and chaotic TiBw distribution. Good application prospects, solve the mismatch between strength and plasticity, and improve the effect of strong-plasticity matching performance
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[0045] Example 1
[0046] (1) B nano powder and GNPs are uniformly mixed
[0047] The B nanopowder and GNPs are accurately weighed at a mass ratio of 1:100 and dispersed in absolute ethanol. The B@GNPs solution is obtained by ultrasonic dispersion for 0.1h under 500W ultrasonic power;
[0048] (2) Preparation of B@GNPs / Ti composite powder
[0049] Add spherical pure Ti powder with an average particle size of 30μm into the B@GNPs solution, stir it magnetically for 5 minutes at a stirring rate of 500r / min, and then filter and dry to obtain B@GNPs / Ti composite powder; among them, GNPs are The mass fraction of B@GNPs / Ti composite powder is 1%;
[0050] (3) Sintering
[0051] Put the B@GNPs / Ti composite powder into a heat-resistant steel mold, use the SPS device to raise the temperature to 600°C (measurement temperature at the temperature measuring hole of the steel mold), and apply a pressure of 100MPa at the same time. 5min, then cooled with the furnace to obtain B@GNPs / Ti green body;
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[0055] Example 2
[0056] (1)TiB 2 Nano powder and GNPs are uniformly mixed
[0057] TiB 2 Nanopowders and GNPs are accurately weighed at a mass ratio of 1:20 and dispersed in absolute ethanol. Under the ultrasonic power of 300W, they are dispersed in ultrasonic for 1h to obtain TiB 2 @GNPs solution;
[0058] (2)TiB 2 Preparation of @GNPs / Ti6Al4V composite powder
[0059] Add flaky Ti6Al4V alloy powder with an average particle size of 30μm to TiB 2 In the @GNPs solution, magnetically stirred at a stirring rate of 200r / min for 60 minutes, then filtered and dried to obtain TiB 2 @GNPs / Ti6Al4V composite powder; among them, GNPs are in TiB 2 The mass fraction of @GNPs / Ti6Al4V composite powder is 0.01%;
[0060] (3) Sintering
[0061] TiB 2 @GNPs / Ti6Al4V composite powder is put into a heat-resistant steel mold, and the temperature is raised to 700°C (measurement temperature at the temperature measuring hole of the steel mold) by using the SPS device, and 350MPa pressure is applied at the same...
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