A CO2 Laser was used to sinter the copper-matrix green compact,interdiffsion of elernents occured,forming the novel phases such as e and η which could hardly be seen by conventional sintering. The properties of sintered material were measured,the results were that density,wear resistance and impact toughness were much higher than the convertional sintering.
Using the microwave sintering new technology, the technology and property of WC Co fine grain cemented carbide in microwave sintering was studied and compared with conventional sintering technology.
For the goal to overcome the problems due to the fuel and pollution of conventional sintering, a primary study about microwave sintering of magnetite concentrates has been done.
It was found through measurement ,analysis and contrast of the heating patterns in the beds that the agglomerating mechanism of PSP is similar to that of conventional sintering process.
Conventional sintering technique and spark plasma sintering technique(SPS)have been used to prepare sintered NdFeB magnetic alloys of same composition.
The influence of C content on the magnetic properties of sintered NdFe-B permanent magnets was studied. The NdDyAlCuBFe permanent magnets were produced by the conventional sintering process,using two kinds of raw material with different C content.
894t -m"2 *h~', the solid fuel exhaust was 54.07kg ?t"1, the FeO content was 8.99%, and the results of the conventional sintering process also indicates that with the increase of total iron content and the decrease of SiC>2 content, the mechanical strength and yield of sinter decreases, and can't reach the demand of morden BF.
But two problems can not be overcame. Firstly, the conventional sintering process needs 3～5 percent carbon, and it will exhausted a large mounts of coal resource.
In this technique by pelletizing flotation con-centrates of manganese carbonate ore with 0.1%ZH binder,followed by draught sintering,the charges for electric furnace can be made for smelting Carbon-manganese and silicon-manganese,while it is difficult to produce the charges using conventional sintering techniqueor pellet roast process.
In this paper some modern sintering techniques as well as their properties for nano-grained cemented carbide such as pressure sintering, field assisted sintering, microwave sintering and two-phase sintering were summarized. In addition, more attentions should be paid to the feasibility of conventional sintering such as vacuum sintering in nano-sized cemented carbide technique according to the results of our experiments.
With this process raw powders, as applied for the "conventional" sintering route as well as recycled powders from used bipolar plates, have been applied.
Conventional sintering was carried out in an inert atmosphere while microwave sintering was performed under ambient conditions.
As compared to conventional sintering, compacts sintered in microwaves exhibit higher densification and finer microstructure but no corresponding improvement in mechanical properties and wear resistance.
Porous TiNi shape-memory alloys (SMAs) have been successfully fabricated by three different processes, including capsule-free hot isostatic pressing (CF-HIP), conventional sintering (CS), and self-propagating high-temperature synthesis (SHS).
After LS, the samples exhibited considerable shrinkage, which was very different from the effects of conventional sintering (CS).
A pot grate tests were conducted in the laboratory using different kinds of materials with various basicity and rate of solid fuel. It was found through measurement ,analysis and contrast of the heating patterns in the beds that the agglomerating mechanism of PSP is similar to that of conventional sintering process. In addition ,the effects of solid fule rate and adhesion of the solid fule on the surface of green balls in the PSP were investigated.
A new sintering technique has been developed for producing the charges forsmelting manganese alloys in electric furnaces. In this technique by pelletizing flotation con-centrates of manganese carbonate ore with 0.1%ZH binder,followed by draught sintering,the charges for electric furnace can be made for smelting Carbon-manganese and silicon-manganese,while it is difficult to produce the charges using conventional sintering techniqueor pellet roast process.
A CO2 continuous laser was used to sinter copper and iron based powder sreen compacts (with an effective thickness of≤10mm) by bulk radiation, followed by the survey and analysis of their microstructure porosity, hardness, impact toughness, tensile stength and wear resistence. Results show that bulk compact sintered by laser has the structure and properties superior to conventional sintering.
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