In the paper is reviewed the study of strength and structure of WC-Co hard alloy. It indicated that WC-Co hard alloy is characteristic of particle compound reinforcing material,based on which investigation is made into the microstructure and preparation technology of the said alloy.

Description is made of the crystal structural feature,thermal stability,research,preparation and application of β-type MoO3 are described.

Analysis is made of reason for metal tungsten loss during APT preparation by ion exchange.Meanwhile,based on the theory and practice,effective measures are presented for reduction of metal tungsten loss and improvement of overall metallurgical metal tungsten recovery up to 95%.

The paper has reviewed the latest development and mechanism of carbon nanotubes enhancement of CVD diamond nucleation.

This paper reviews the production processes of titanium sponge,focusing on the latest development of Kroll Process and the FFC Cambridge Process.And the paper has forecasted China's titanium sponge production and its technologies in the future.

Description is made of the operating status and requirement for its property, related manufacturing technology and impact of additives on AgSnO2 contact material.Discussion is made on the latest development of AgSnO2 contact material.And the future research emphasis and tendency are pointed out.

The effect of mechanical activation on leaching kinetics of molybdenite is studied.Mechanical treatment causes slight depression of apparent activation energy for leaching molybdenite in HNO_3-H_2SO_4 solution.After 40-minute intensive mechanical activation in planetary centrifugal ballmill,the activation energy becomes 6kJ/mol less than that for leaching of non-activated one.We ascribe this to the layered structure of molybdenite.When violent mechanical force is acted on molybdenite crystal,it is easy to obviate such force through inter-layer slip since the Van der Vals force between S-S layers is very weak.

The reaction expression of precipitation and crystallization is put forward based on the pH value change during neodymium chloride precipitation by ammonium hydrocarbonate.Study is made of the influence of feed rate,dosage,aging time on the process of neodymium carbonate crystallization.The technological condition for rapid precipitation of crystalline neodymium carbonate is verified.

With the depletion of wolframite,scheelite concentrate substitute has become the developing trend of the future extractive metallurgy of tungsten.For the hydrometallurgical processing of scheelite concentrate by fluoride solution,the equlibrium concentration logarithm diagrams of every component is drawn according to thermodynamics calculation,under conditions of 0.10 mol/L and 0.12 mol/L fluoride concentration.Based on the logarithm diagram,the thermodynamic analysis is made of scheelite leaching by fluoride solution.

Study is made of the impact of plating solution composition and technological conditions on the sedimentation velocity of Ni-B alloy. Proper technological conditions of chemically-plated Ni-B alloy is selected, based on which amorphous Ni-B alloy layer is obtained containing 4.508% boron with good corrosion resistance.