| 摘要 |
A borided titanium article can include a titanium mass having titanium monoboride whiskers infiltrating inward from a surface of the titanium mass to form an integral surface hardened region. The titanium mass can be almost an y titanium based metal or alloy such as high purity titanium, commercial grade titanium, a-titanium alloy, .alpha.+.beta. titanium alloy, .beta.-titanium alloy, titanium composite, and combinations thereof. Borided titanium articl es can be formed by methods which include providing a titanium mass, contacting a surface of the titanium mass with a boron source medium, and heating the titanium mass and boron source medium to a temperature from about 700 ~C to about 1600 ~C. The boron source medium can include a boron source and an activator selected to provide growth of titanium monoboride whiskers. The boron source medium can be provided as a solid particulate mixture, liquid mixture, or as a gaseous mixture. During heating, boron from the boron sourc e infiltrates into the titanium mass and forms titanium monoboride whiskers which improve the surface hardness, wear resistance, oxidation resistance, a nd corrosion resistance of the treated surface. The titanium monoboride whisker s can be controlled to have the desired dimensions, depending on the applicati on requirements.Boriding titanium surfaces using these methods, provides a relatively inexpensive and effective process for improving the surface properties of titanium which are then useful in a wide variety of applicatio ns.
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