查询词典 powders

In order to reduce the cost more and accelerate the application in the civil area, the laser rapid forming technology with low cost hydrogenation dehydrogenization titanium alloy powders had been investigated, and the following results were obtained:1 Disclosed the formation mechanisms and influencing factors of t.

为进一步降低该技术的成本，促进其在民用领域的发展，本文针对低成本氢化脱氢(hydrogenmiondehydrogenization，HDH)钛合金粉末的激光快速成形进行研究，取得的主要成果如下： 1。从粉末特性及成形工艺角度揭示了缺陷的形成机理及影响因素，结果发现：(1)气孔的产生是由于粉末在成形过程中卷入成形气氛中的氩气所致。

When nano-structured TiC and TiN powders accounted for 20wt％ of all the amount of TiC and TiN, the vacuum sintering could densify the cermets completely.

试验结果表明：当纳米TiC、TiN的含量分别为TiC、TiN总量的20％时，真空烧结即可使其达到接近100％的致密度。

In addition, we also discussed the effect of the granularities of the powders and the added phases on the mechanical properties of the alumina-based diphase ceramics.

另外本文还讨论了原料粉末的起始粒度和添加相对氧化铝基复相陶瓷的影响。

It was found that PEG4000 had a great effect on disagglomeration of nano powders and its additive content was associated with the synthesis process.

发现PEG4000能有效改变纳米颗粒的团聚现象，其添加量和制备方法有关。

The PZT powders with different granularity and dispersity were prepared by sol-gel method.

用sol-gel法制备了不同粒度和分散性的PZT超细粉体。

Several steps were put forward to synthesize powders with thin granule, uniformity and good dispersity.

提出了制备颗粒细小、均匀、分散性好的粉体颗粒需要采取的几个措施。

In the end, the dispersity and stability in sol of PZT powders were discussed. The thick film with 15 micron was prepared by 0-3 composite method.

分析了PZT粉体的分散及其在溶胶中的稳定，用0-3型复合法制备了厚度达15μm的PZT厚膜。

Using pure Ti and Ni powders, a promising artificial bone material, nearly equiatomic stoichiometry Ti-Ni shape memory alloys porosity was prepared by combustion synthesis method.

使用Ti、Ni纯元素粉末，用燃烧合成技术制取了近等原子比的多孔Ti-Ni形状记忆合金，一种理想的人造骨骼材料。

The influence of sintering temperature and composition on the microstructure of Y-Ba-Cu-O superconducting ceramic prepared by reactive sintering was investigated. While the oxide powders react and sinter into the superconductor, transient liquid phase can disappear rapidly, and equilibrious liquid phase can promote the anisotropic growth of superconducting grains and isolate the grains.

本文运用X射线衍射、光学金相、扫描电子显微分析、热分析等材料研究手段研究了Y-Ba-Cu-O和Bi-Pb-Sr-Ca-Cu-O两个体系超导陶瓷的超导相与显微组织的形成过程，着重研究了液相在此过程中的作用，同时考察了显微组织与超导性能间的关系。

According to plasticity of porous and dense materials, an evolution model of dimensions and relative density for cylindrical canned powders during hipping was first established and the criterion for uniform compaction under the same conditions was derived. The above results can serve as a guidance for determining the can dimensions in practice.

根据孔隙性材料和致密材料的塑性理论，本文首次建立了圆柱形包套粉末体在热等静压过程中几何尺寸及相对密度的演化模型，提出了圆柱形包套粉末体均匀收缩的临界判据，对实际生产中合理确定包套尺寸具有指导作用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。