烧结

The effect of post-sintering heat treatment on the mechanical properties of a liquid phase sintered tungsten-base ahoy (95W-3.SNi-1.5Fe) has been investigated.

研究了液相烧结钨基高比重合金(95W-3.5Nj-1.5Fe)烧结后热处理对力学性能的影响。

The other aliquot was hydrothermally treated at 200℃,and then it was also used for fabricating the gas sensors(denoted as "pre-treated sensors").

SnO2气敏传感器从结构上分为厚膜型、薄膜型和烧结型，其中烧结型和厚膜型是当今实用气敏元件的主流。

The results show that the ambient oxygen and ratio of the materials are critical to microwave sin...

结果表明：利用微波反应烧结β′-Sialon，原料配比和炉气中氧含量很关键；微波反应合成烧结Z值等于3的β′-Sia-lon的最佳工艺是1500℃、保温90 min，该工艺烧结的材料密度为3.050 g/cm3和室温抗弯强度为150 MPa。

The powder paving is impact on sintering process and prototyping quality in SLS processing. The process of powder paving with roller is analyzed, and is described with mathematics.

在激光选区烧结过程中，铺粉对烧结成形的顺利进行和烧结成形质量都具有重要的影响，为此，对辊式铺粉过程进行了深入分析，并且用数学方法对铺粉过程进行了描述。

In comparison with the sample directly sintered at 650 ℃＜TN, an interesting, irreversible transformation in the crystal structure of the MgB2 phase is observed with the sample going through the stages of initial sintering at 750 ℃, then re-sintering at 650 ℃ in an Mg-rich environment after the processes of regrinding and pressing.

把直接在650 ℃＜T N，烧结的样品与先在750 ℃下烧结，之后又再次重磨和处理后，并于富镁的环境中在650 ℃下再烧结处理的样品相比较，观察到了MgB2的不可逆的晶体结构转变。

In view of abnormality of about 200 ℃ temperature drop in the bottom of the sintering box during pressure sintering (after argon charged into the furnace) with imported pressure sintering furnace,analysis is made of the cause of the fault,and technical upgrading option is given together with a serials of specific measures.

针对进口压力烧结炉在加压烧结阶段出现烧结盒下部温度下降约200℃的异常情况，进行了故障的原因分析，提出了设备的技改方案，并采取了一系列具体措施。

In this thesis, the research about surface modification of titanium alloy was carried on starting with improving stability of calcium phosphate biomedical coating by force of chemical treatment, Physical Vapor Deposition of titanium metal at high temperature and Electrophoresis Codeposition and sintering technology of the coating. By way of the studying of graded design of microstructure and composition of coating and EPCD and sintering technology, a systemic technology by which a calcium phosphate graded ceramic coating was prepared and sintered rapidly on the surface of a complex shaped product was obtainedand a high function titanium alloy/bioglass/hydroxyapatitegraded coating wasdeveloped.

本文从改善钛合金表面钙磷生物涂层的稳定性入手，采用化学处理、高温真空镀钛和电泳共沉积--烧结等技术对钛合金的表面进行了改性的研究，通过对涂层的结构和组成的梯度设计和EPCD--烧结技术的研究，获得了较系统的能在复杂形状的制品表面涂覆钙磷梯度涂层及其低温快速烧结技术，并研制出了高性能的钛合金／生物玻璃／羟基磷灰石梯度涂层。

The simulation was conducted by using steel 25 powder. Results show that great temperature gradients exist in the front of laser spot, and phase transformation temperature of powder around laser spot is higher than the powder's melting point.

以25号钢粉末为烧结材料进行了数值模拟，模拟结果表明：激光烧结过程中，在光斑中心的前端存在着极大的温度梯度；光斑中心的温度高于金属粉末的熔点，烧结过程中存在液相。

The Measures of Improving the Sintered Strength of the Coated Sand Mold Made by Selected Laser Sintering SLS

分析了影响覆膜砂铸型烧结强度的因素，详细地讨论了提高选择性激光烧结覆膜砂铸型烧结强度的各种措施。

For the same size of powder, the porosity of the pressed blank decreases with the increase of pressing pressure. The porosity of pressed blank of coarse powder is smaller than that of fine powder for the same pressure....

当烧结温度和烧结时间相同时，细粉多孔钨的孔隙度要小于粗粉多孔钨的孔隙度，对同粒度粉末，压坯孔隙度随烧结温度升高而减小。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。