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15th International Conference on refractory metals Pu Lanxi dominate

Molybdenum metal powder before the liquid nitrogen with a solution of doped lanthanum molybdenum oxide powder,[link widoczny dla zalogowanych], allegedly using this method can be formed in the molybdenum metal powder is very fine dispersed La20,[link widoczny dla zalogowanych], high-temperature properties of the powder is excellent. The paper produced by the C Industry containing 2% of the ODS La2O3 PML aluminum rolled village was evaluated. Different solidification method and thermo-mechanical processing system,[link widoczny dla zalogowanych], can be processed into ODS molybdenum plate village,[link widoczny dla zalogowanych], the village bar. Gold Card Qing Hei 300 ~ C ~ 1800 ℃ high temperature tests showed that the amount of cold temperature performance is very small. And <300 \The observed plastic-brittle transition temperature is much lower than a room temperature and the ratio of the PM alloy molybdenum without plastic. Brittle transition temperature is low. At 1200 ℃ ~ l700 ℃, measured under ultrahigh vacuum creep rupture properties of the material, the results show that the previous cold creep rupture properties of very large organizations ODS molybdenum metallurgical creep rupture life of a great , this effect depends on temperature. At 1200 ℃, stress 1034MPa, the stress release sample recrystallization creep rupture life is the creep rupture life of more than 3 times, and in 1500 ℃ and 1700 ℃, the situation on the contrary, the fracture recrystallization Life after the release of stress rupture life ODS molybdenum 3 times. In all test temperatures, ODS molybdenum and not alloyed PM Mo compared to the former creep resistance is much higher than the latter. Germany MKlluwcr electronic applications of the electronic plug-in, who used W-Cu and Mo-Cu alloy injection molding. This particular application is to gallium arsenide (Ca ~) chip-based high-frequency circuit module of the capacitor. In order to reduce thermal stress, the shell material requirements: high density, high thermal conductivity (for heat) and low thermal expansion coefficient. On the pseudo-alloy of copper or immiscible composite materials and refractory metals tungsten and molybdenum by MIM production of near net shape parts of the study, that these materials in electronics applications and competitive materials (such as aluminum nitride and silicified aluminum) compared to great advantage. In order to achieve the desired density and microstructure, their raw materials and alloy powders of different composition were studied, focusing on the sintering performance. Research projects include copper alloys, particle size, sintering temperature and time. Grinding machine with Mo60. Cu40 mixed powders were ground, crushing the mass of molybdenum to improve the sintering activity. In addition, with the H. C. Starck developed the so-called Mc-Cu and W-Cu \Also on the Mo-Cu alloy samples were injection molding expansion of sintering test results showed that after grinding of sintered copper powder containing 4% of the activity was significantly increased, reaching almost 60% t ~ mixed with the powder shrinkage units. Tensile strength of grinding powder over 480MPa, elongation 98%, however, contains 32% copper powder Mo-Cu compounds, the best results, this time to reduce the particle size of molybdenum 2gm --- 4ttm, and uniform distributed in the copper body. Containing l0 ·} W. Copper 30% deduction Cu powder injection molding and sintering test results, while somewhat similar, but because of low sintering activity, so require a higher sintering temperature, which may produce bending. In addition, 20% copper containing W. Cu powder material of Taiwan, the best results obtained. Copper barrier forming the matrix W, adjustable porosity and shape the relationship between instability and uniform microstructure. Finally, RC. ~ 1311an a brief overview of Mr. and liquid injection molding sintered W-Cu Taijin applications in the electronics field emblem, and Refractory Metals and Hard Materials injection molding of the prospect. German President mentioned several times the production of by injection molding complex, high-performance advantages of near net shape parts. Some other applications include refractory metals titanium surgical instruments, watches and luxury titanium golf club head and part of mass inertia of tungsten and tantalum capacitors. (Wang Ho) of the Eleventh National Conference on Magnetism and Magnetic Materials will be held by the Chinese Institute of Electronics, Chinese Physical Society, Chinese Society for Metals, Chinese Society of Rare Earths, China Metrology Society, the China Instrument Society of China jointly organized XI session of the National Conference of magnetism and magnetic materials will be in October 2002 held in Changsha City in Hunan. Estimated 600 participants, the meeting mainly include: magnetic materials, magnetic measurement and metrology, testing instruments and equipment manufacturing, magnetic material production, application and market. (High King) Metal Bulletin No. 2 2002 29

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