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Ni-Cr/BN composite was produced in the active sintering process using nickel carbonyl,Cr2O3 and C powders as original materials,and hexagonal BN powder as solid lubricant.

在现代机械制造工程中，为发展热动力机械等先进设备，需要研制出能够在高温下使用的自润滑复合材料[1]。

The preparation methods of nickel-coated composite powder consisting of hydrothermal hydrogen reduction, electroless plating, decomposing of nickel carbonyl, and electroplating were summarized and its applications in thermal spraying field such as base, abradable seal, abrasion resistant, and self-lubricating coatings were introduced.

本文综述了镍包覆型复合粉末的制备方法，主要有水热氢还原法，化学镀法，羰基镍分解法和电镀法；介绍了国内外常见镍包覆型复合粉末在热喷涂领域中的应用情况、包括作为底层、封严涂层、耐磨涂层和自润滑涂层材料。

Ni-Cr/BN composite was produced in the active sintering process using nickel carbonyl, Cr2O3 and C powders as original materials, and hexagonal BN powder as solid lubricant.

摘 要：以羰基Ni粉、Cr2O3和C粉为原料，添加六方BN作为固体润滑剂，采用粉末冶金活化烧结工艺制备Ni-Cr基自润滑材料。

Aiming to a method for the synthesis of silicon nitride powder by direct nitridation process based on fluidization technology, a two-dimensional mathematical model of thermal process in a suspended bed was established, the thermal process was simulated based on the commercial CFD software FLUENT, and the effects of the flow velocity of nitrogen gas, the ratio of particle to gas and nitridation temperature on the temperature of the bed and the conversion rate of silicon were analyzed.

针对基于流态化技术利用硅粉直接氮化合成氮化硅粉的新工艺，建立了悬浮床内热过程的二维数学模型，并借助CFD商业软件FLUENT对悬浮床内热过程进行了数值模拟，分析了氮气速度、粉气比和氮化温度等因素对温度场和硅转化率的影响。

The strain can grow on the carbon source glucose or soluble starch and the nitrogen source peptone or soybean powder, but not on the inorganic nitrogen source ammonium chloride or ammonium sulfate.

该菌株能利用碳源葡萄糖和可溶性淀粉；能利用氮源蛋白胨，黄豆粉等，不能利用无机氮源NH_4Cl和(NH_4)_2SO_4。

Calcium in Positive powder of thermal-activated battery measured by atomic absorption spectroscopy with Nitrogen Monoxide was studied and reported in this paper.

0引言在热激活电池的制造过程中，发现正极粉的结构及其化学成分对电池性能有明显的影响。

The mainly conclusions in our research are as flowing: tungsten trioxide powders with 100 nm primary particle are obtained by spray drying,calcination and wet milling process, and an average size of quadric particle composed of agglomerated particles is 0.64 μm; tungtsen powders with 39 nm grain size and 60 -100 nm primary particle are produced directly from previous tungsten trioxide using one step reduction in hydrogen at 700℃, and an average size of quadric particle of tungsten powder is 2.91 μm; tungsten trioxide and copper tungstate compound powders with 100 nm - 200 nm primary particle are produced using ammonia metatungsten and copper nitrate as raw materials by spray drying,calcination and wet milling process;the compound powders are transformed completely into tungsten and copper compound powders by reduction in hydrogen at 700℃,in which tungsten grain size is 59 nm and copper grain size is 51 nm; primary particle size of compound powders is 80 - 120 nm,and an average size of agglomerated quadric particle is 1.86 μm; tungsten nitride powders with 35 nm grain size are prepared from tungsten trioxide powders by nitrogen treatment thoroughly in pure ammonia at 650℃, and an average size of agglomerated quadric particle is 0.64 μm in normal temperature.

研究结果表明：采用喷雾干燥—焙烧—球磨工艺可以制备出粒度约为100nm的WO_3粉体，它们在团聚后形成的二次颗粒平均粒度为0.64μm；采用一步直接氢还原方法可在700℃下从上述WO_3粉体制备出晶粒尺寸为39nm的、一次颗粒粒度为60-100nm的W粉体，其二次颗粒的平均粒度为2.91μm；以偏钨酸铵、硝酸铜为原料，采用喷雾干燥—焙烧—球磨工艺可制备出一次粒度为100-200nm的WO_3和CuWO_4混合粉体；采用氢还原工艺可在700℃下将这种粉体完全转变为W、Cu复合粉体，其中W的平均晶粒粒尺寸为59nm，Cu的平均晶粒尺寸为51nm；复合粉体的一次颗粒尺寸为80-120nm，在常温下团聚后形成的二次平均粒度为1.86μm；采用纯氨氮化工艺可以在650℃下由WO_3粉体制得WN，其晶粒尺度为35nm，在常温下团聚后的二次平均粒度为6.4μm。

We would like to introduce ourselves as one of the leading manufacturers of powder Syntans in India.

我们以作为印度领先的syntan粉加工制造商向您引荐自己。

The existing points and the research direction in future for powder metallurgical superalloy are presented in this paper.

可以说外来非金属夹杂物的存在是继原始颗粒边界问题基本解决后，粉末高温合金发展所遇到的最大障碍。

This paper reviews recent developments in nickel-based powder superalloy used in aircraft turbines,and discusses the problems encountered in this research field in China.

综述了国内外飞机涡轮盘用镍基粉末高温合金的研究进展，分析了国内在粉末高温合金的研制过程中面临的问题及其解决途径。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。