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大试样
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  large sized specimens
    The oxidation resistance of unfired Al-Si-containing low carbon Al2O3-β-SiAlON material(MAC-F)was investigated using high temperature thermogravimetric analyzer for large sized specimens,and the oxidation resistance of this material is compared with unfired Al-Si-containing Al2O3-C material(MAC-S).
    采用大试样高温热重分析仪研究了不烧Al-Si复合低碳Al2O3-β-SiAlON材料(MAC-F)的抗氧化性,并与Al-Si复合不烧铝碳滑板材料(MAC-S)进行了比较。
短句来源
    The structure and characteristics of the high temperature thermogravimetric analyzer(TGA) for large sized specimens and its application in researches of oxidation resistance and nitridation reaction were introduced.
    介绍了大试样高温热重分析仪的结构和特点以及在抗氧化性和氮化反应研究中的实际应用。
短句来源
  large sized specimens
    The oxidation resistance of unfired Al-Si-containing low carbon Al2O3-β-SiAlON material(MAC-F)was investigated using high temperature thermogravimetric analyzer for large sized specimens,and the oxidation resistance of this material is compared with unfired Al-Si-containing Al2O3-C material(MAC-S).
    采用大试样高温热重分析仪研究了不烧Al-Si复合低碳Al2O3-β-SiAlON材料(MAC-F)的抗氧化性,并与Al-Si复合不烧铝碳滑板材料(MAC-S)进行了比较。
短句来源
    The structure and characteristics of the high temperature thermogravimetric analyzer(TGA) for large sized specimens and its application in researches of oxidation resistance and nitridation reaction were introduced.
    介绍了大试样高温热重分析仪的结构和特点以及在抗氧化性和氮化反应研究中的实际应用。
短句来源
  “大试样”译为未确定词的双语例句
    The apparatus accepts samples with maximum dimensions of 100 mm×100 mm×180 mm,maximum mass 5000 g,and maximum experimental temperature 1600 ℃.
    该仪器允许的最大试样尺寸为100mm×100mm×180mm,最大试样质量为5000g,最高试验温度达1600℃。
短句来源
    High temperature thermogravimetric analyzer for large sized specimen and its application in refractories research
    大试样热重分析仪及其在耐火材料研究中的应用
短句来源
    The results indicate that with appropriate content of ultra fine alumina powder and additive A,both cold and hot mechanical properties of specimens are notably enhanced. The microstructure of specimen is dense,and only a few pores are observed. Main phase of the specimen is corundum,β Sialon is also observed as the bonding phase,a little impurity is observed.
    结果表明 :基质中加入适当的氧化铝微粉和添加剂A对试样的力学性能提高很大 ,试样组织结构致密 ,气孔少、烧结好 ,主晶相为刚玉 ,次晶相为 β Sialon ,杂质含量很少
短句来源
    However,the linear change of the former after treatment at 1500 ℃ for 3 h (carbon embedded) was higher,and the HMOR and corrosion resistance were poorer.
    但是,采用铝酸钙水泥+SiO2微粉作结合剂的试样经1500℃埋炭3h处理后的线变化率较大,试样的高温抗折强度和抗侵蚀性能也明显低于ρAl2O3结合试样的。
短句来源
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  large sized specimens
The present structure estimation methods are rather long-termed and expensive; moreover, they are sometimes impossible to use in reason of difficulty of sampling large sized specimens.
      
  large sized specimens
The present structure estimation methods are rather long-termed and expensive; moreover, they are sometimes impossible to use in reason of difficulty of sampling large sized specimens.
      


The structure and characteristics of the high temperature thermogravimetric analyzer(TGA) for large sized specimens and its application in researches of oxidation resistance and nitridation reaction were introduced.The TGA consists of four systems,including electronic heating,atmosphere control,mass measuring and automatic control.The apparatus accepts samples with maximum dimensions of 100 mm×100 mm×180 mm,maximum mass 5000 g,and maximum experimental temperature 1600 ℃.It is not only capable of measuring “mass-temperature”...

The structure and characteristics of the high temperature thermogravimetric analyzer(TGA) for large sized specimens and its application in researches of oxidation resistance and nitridation reaction were introduced.The TGA consists of four systems,including electronic heating,atmosphere control,mass measuring and automatic control.The apparatus accepts samples with maximum dimensions of 100 mm×100 mm×180 mm,maximum mass 5000 g,and maximum experimental temperature 1600 ℃.It is not only capable of measuring “mass-temperature” curves at elevating temperature (by elevating temperature method),but also recording “mass-time” curves at constant temperature (by constant temperature method).The oxidation resistance of Al_2O_3-C slide plate and the specimens of β-SiAlON-Al_2O_3 were determined by both methods and the nitriding reaction of high alumina bauxite specimens was determined by elevating temperature method,all of which have achieved approving results.

介绍了大试样高温热重分析仪的结构和特点以及在抗氧化性和氮化反应研究中的实际应用。该仪器由电加热、气氛控制、质量测量和自动控制四大系统组成。该仪器允许的最大试样尺寸为100mm×100mm×180mm,最大试样质量为5000g,最高试验温度达1600℃。该仪器既可以记录试样在匀速升温过程中的“质量-温度”曲线(升温法),又可以记录试样在恒定温度下的“质量-时间”曲线(恒温法)。采用升温法和恒温法分别研究了铝碳滑板试样和β-SiAlON结合刚玉试样的抗氧化性,并采用升温法研究了高铝矾土试样的氮化反应,结果均令人满意。

The oxidation resistance of unfired Al-Si-containing low carbon Al2O3-β-SiAlON material(MAC-F)was investigated using high temperature thermogravimetric analyzer for large sized specimens,and the oxidation resistance of this material is compared with unfired Al-Si-containing Al2O3-C material(MAC-S).The results show that:(1)The mass changes of two materials were similar at 250~1 500 ℃.The masses decreased below 500 ℃,and began to increase at 500 ℃.The increases of mass change rate of two materials were similar...

The oxidation resistance of unfired Al-Si-containing low carbon Al2O3-β-SiAlON material(MAC-F)was investigated using high temperature thermogravimetric analyzer for large sized specimens,and the oxidation resistance of this material is compared with unfired Al-Si-containing Al2O3-C material(MAC-S).The results show that:(1)The mass changes of two materials were similar at 250~1 500 ℃.The masses decreased below 500 ℃,and began to increase at 500 ℃.The increases of mass change rate of two materials were similar at 500~1 100 ℃.Above 1 100 ℃,the increase of mass change rate of MAC-S greatly increased,and that of MAC-F slightly decreased.(2)After oxidized at 1 500 ℃,MAC-F had the obviously lower mass increasing rate than MAC-S,and the oxidized layer was very thin (only 0.5 mm).Much short column mullite crystals in the oxidized layer filling in the interstices of corundum skeleton structure in the oxidation layer of MAC-F forming dense structure,and a thin film composed of mullite and a little glass phase covering the oxidizing surface,which prevented the penetration of oxygen and retarded the oxidation.So the oxidation resistance of MAC-F was better than that of MAC-S.

采用大试样高温热重分析仪研究了不烧Al-Si复合低碳Al2O3-β-SiAlON材料(MAC-F)的抗氧化性,并与Al-Si复合不烧铝碳滑板材料(MAC-S)进行了比较。结果表明(1)两种材料在250~1100℃氧化时的质量变化规律相似,在500℃以前均处于质量损失状态;从500℃开始试样处于质量增加状态,500~1100℃之间两种材料质量变化率的增加量差别不大;1100℃以上材料MAC-S的质量变化率的增加量明显提高,而材料MAC-F质量变化率的增加量稍有降低。(2)1500℃氧化后,材料MAC-F质量增加率明显低于材料MAC-S的,氧化层很薄,厚度仅0.5mm。材料MAC-F的氧化层中有较多的短柱状莫来石晶体,均匀地分布在刚玉骨架结构的空隙中,形成致密的结构,对氧气进入材料的内部起到了阻碍作用。其氧化层表面覆盖着一层由莫来石和少量玻璃相组成的光滑薄膜,更有效阻碍了氧气向内部的渗透。因此,材料MAC-F与材料MAC-S相比,抗氧化性能更为优异。

 
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