烧结

Effect of superfine Ni powder addition on the sintering process and final properties of driven gear s was studied.

研究了经超细化处理的镍粉对从动齿轮烧结工艺和性能的影响。

In this paper, the mechanism of explosive sintering is studied, and the shock wave parameters of the W-Ti powder compound by the superimposition principle are computed.

本文首先对爆炸烧结机制作了简要的分析。然后利用叠加原理建立了对多元粉末激波参数的计算方法，计算了W-Ti二元粉末的激波参数。

The results show that:(1) after MA for 20h, single phase bcc nanocrystalline supersaturate solid solution formed in Fe84Nb7B9 and Fe80Ti8B12 alloys; the thermal stability of nanocrystalline microstructure in Fe80Ti8B12 alloy was improved significantly than that in Fe84Nb7B9 alloy, and the decomposition temperature of supersaturate solid solution decreased in Fe80Ti8B12 alloy.(2) under 30MPa/900℃/0.5h hot-press sintering conditions, the relative density of Fe84Nb7B9 and Fe80Ti8B12 bulk alloys were 96.7% and 95.5%, respectively. Compared with Fe84Nb7B9 alloy (muti-phase microstructure), Fe80Ti8B12 alloy was composed of superfine crystalline (50~200nm) of single phase α-Fe;(3) the magnetic properties of Fe80Ti8B12 bulk alloy σ(subscript s=198.6emu/g, H=54.6Oe were more excellent than that of Fe84Nb7B9 bulk alloy σ(subscript s=162.9emu/g, H=105.1G, it was related to the different phases formed during hot-press sintering and the grain size of nanocrystalline powder.

结果表明：(1)20hMA后，Fe84Nb7B9和Fe80Ti8B12均形成了单相bcc纳米晶过饱和固溶体，相对前者，后者纳米晶组织热稳定性明显提高，过饱和固溶体相分解温度略有降低；(2)在30MPa/900℃／0.5h热压条件下，Fe84Nb7B9和Fe80Ti8B12块体合金相对密度分别为96.7%和95.5%，相对前者，后者由超细晶(50~200nm)单相α-Fe组成；(3)Fe80Ti8B12块体合金软磁性能σ(下标 s=198.6emu/g，H＝54.6Oe明显高於Fe84Nb7B9块体合金σ(下标 s=162.9emu/g，H＝105.1Oe，此与纳米晶粉末在热压烧结过程中所形成相的种类和晶粒尺寸大小有关。

Firstly in this paper human mandibula was scanned by spiral CT. Then the data from CT was import into software (MIMICS 7.10) to reconstruct 3-D digital model. Software (Surfacer 10.5) was used to remove useless points , smooth the curves and output the STL file. The file was input into the rapid prototyping system, and was converted to slice format.

本研究首先用螺旋CT扫描离体人下颌骨，得到断层图像数据不经任何转换直接输入MIMICS软件进行三维重建，得到CAD三维数模，输入Surfacer软件除去杂点干扰，平滑曲面后，保存为STL文件，输入SLS快速成形系统通过激光烧结精铸蜡粉所制作的人下颌骨复制体，其形态、大小及结构与下颌骨实体标本基本一致。

The thermodynamic calculation shows that it needs to consume 065 t of Na2CO3 in treating pseudoleucite syenite ore per ton, and about 95％ Na2CO3 could be recycled.

烧结反应实验结果表明，采用碳酸钠为助剂，假白榴正长岩粉体在760～880 ℃条件下反应10～15 h，矿石中主要矿物的分解率可达971％。

It indicates that when the pseudoleucite syenite was sintered at 760-880 ℃ for 1.0-1.5 h,with the sodium carbonate as the additive,the decomposition rate of minerals in the pseudoleucite syenite could reach 97.1%.

在综合分析假白榴正长岩物相组成的基础上，以碳酸钠为助剂，分解假白榴正长岩中主要矿物相，对其进行热力学分析，并与石灰石烧结法进行比较。

Tantalate or niobate compound ; precipitate ; homogeneous ; sintered ; acidwash ; waterwash

钽或铌酸盐化合物；沉淀；均相；烧结；酸洗；水洗

E. , a positive temperature coefficient of resistance .

随烧结温度的升高，材料的电阻率均有降低，TiO〓加入量即TiN含量处于临界值附近（20％TiO〓）的材料降低幅度最大。

The effects the particle size in ternary system on sintering are also studied.

同时还对三元系统中原材料粒度对烧结的影响进行了研究。

And when sintered at 900℃for 10h, the grain shape of Mn-doped BiFeO3 ceramic suddenly changed into tetragon; All doped ceramics were examined on their electronic characteristics.

并且Mn掺杂BiFeO3陶瓷在900℃烧结10h后，其晶粒形状突变成四方体。

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％。