摘要:
Disclosed herein is a heat-dissipating substrate in order to improve heat-dissipating characteristics. The heat-dissipating substrate, comprising: a copper layer having a predetermined thickness; anodized insulating layers formed on upper and lower surfaces of the copper layer; and aluminum (Al) layers formed between the copper layer and the anodized insulating layer. Therefore, a heat-dissipating function of the base made of the aluminum (Al) layer and the copper (Cu) layer is improved, thereby making it possible to provide a high-output metal substrate appropriate for high-integration/high capacity electronic components.
摘要:
Ti powders and Al powders are combined to prepare a mixture of 40.about.55 at % of Al and the balance of Ti. After CIP and degassing, plastic working by hot extrusion is applied to form a shaped mixture of Ti and Al. The shaped mixture is then processed by HIP to synthesize titanium aluminide while diffusing Al into the Ti structure to form an Al.sub.2 O.sub.3 phase occurring from both the reaction between Al and oxygen contained in the Ti structure and the oxides on the Al surface, and to disperse the Al.sub.2 O.sub.3 to form the Al.sub.2 O.sub.3 protective film. With the reaction between Al and oxygen contained in the Ti structure and with the "Pegging" effect, both the Al.sub.2 O.sub.3 a phase formed at the grain boundaries of crystals or in the crystal grains of titanium aluminide and the Al.sub.2 O.sub.3 phase existing on the surface of raw material Al powder peg the surface Al.sub.2 O.sub.3 film to the surface of the titanium aluminide body. This "Pegging" effect enhances the adhesiveness of the film and improves the oxidation resistance of titanium aluminide.
摘要翻译:将Ti粉末和Al粉末组合以制备40%Al的Al%和余量的混合物。 在CIP和脱气之后,通过热挤压进行塑性加工以形成Ti和Al的成型混合物。 然后通过HIP处理成型的混合物以合成钛酸铝,同时将Al扩散到Ti结构中,以形成Al和Ti的结构中Al和Al之间的氧化物和Al表面上的氧化物的分解, Al2O3形成Al2O3保护膜。 通过Ti结构中包含的Al和氧的反应以及“Pegging”效应,Al 2 O 3 a相在晶体的晶界或AlAl 2晶相中形成的Al 2 O 3相存在于原料的表面上 材料Al粉末将表面的Al2O3膜与铝化钛体的表面接合。 这种“钉住”效果提高了膜的粘合性,并提高了铝化钛的抗氧化性。
摘要:
A Ti--Al system intermetallic compound comprised of 25 at. % to 75 at. % of aluminum and the remainder of titanium. The compound includes 0.004 at. % to 1.0 at. % each of at least one halogen element selected from the group consisting of fluorine, chlorine, bromine and iodine. Alternatively, to provide a Ti--Al system intermetallic compound with oxidation resistance, the surface of the Ti--Al system intermetallic compound is heated to 800.degree. C. to 1125.degree. C. in a mixture of gas including 2 ppm to 1% by volume of at least one halogen element selected from the group consisting of fluorine, chlorine, bromine and iodine, and also including 0.1% by volume or more of oxygen. Thus, a dense aluminum oxide film is formed on the surface of the intermetallic compound. Alternatively, to form the dense aluminum oxide film, at least one halogen element is first disposed on the part providing the oxidation resistance of the intermetallic compound, and heated for 0.2 hour or longer at 800.degree. C. to 1125.degree. C. In this case, the halogen amount should be between 0.002 mol/m.sup.2 and 2 mol/m.sup.2.