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Thermoelectric leg made up semiconductor thermoelectric materials fabricated using various techniques. Types of thermoelectric leg is divided into single thermoelectric material or segmented thermoelectric material. The segmented thermoelectric material is the improvement of single thermoelectric material to produce a high performance of thermoelectric device. Previous study shows that electrical contact does give influence to the thermoelectric leg performance. A single thermoelectric leg usually used electrical contact as a connection to n- and p-type thermoelectric leg. The segmented thermoelectric leg also used similar electrical contact to couple the legs. However, there is an interfacial resistance occur in between segmented leg as it formed from different thermoelectric materials. In addition, there is a joining contact in between the segmented materials, which could give effect to the segmented thermoelectric leg. Thus, this study will discuss more on fabrication and the electrical contact in between segmented thermoelectric as the interface layer or joining technique for the segmented leg. A low electrical contact resistance is necessary to produce a high efficiencies thermoelectric device.Thermoelectric leg made up semiconductor thermoelectric materials fabricated using various techniques. Types of thermoelectric leg is divided into single thermoelectric material or segmented thermoelectric material. The segmented thermoelectric material is the improvement of single thermoelectric material to produce a high performance of thermoelectric device. Previous study shows that electrical contact does give influence to the thermoelectric leg performance. A single thermoelectric leg usually used electrical contact as a connection to n- and p-type thermoelectric leg. The segmented thermoelectric leg also used similar electrical contact to couple the legs. However, there is an interfacial resistance occur in between segmented leg as it formed from different thermoelectric materials. In addition, there is a joining contact in between the segmented materials, which could give effect to the segmented thermoelectric leg. Thus, this study will discuss more on fabrication and the electrical contact in betw...

Mixed oxide (MOX) has now become a standard fuel in commercial LWRs. More than 90% of the world’s production is made according to the so-called MIMAS process. Moreover, a new fabrication plant using this process is being designed in the US for the disposition of weapon-grade Pu. The research carried out on advanced MOX fuels at the Transuranium Institute in Karlsruhe contributes to the aim of achieving high burnup. In particular, our efforts are concentrated on the fuel microstructure.

Texas A&M University has begun an investigation of materials and fabrication methods which will improve AMTEC electrode performance. The study currently involves gathering data on materials which meet the basic requirements of operating in an AMTEC cell, and sorting out candidates possessing characteristics conducive to efficient AMTEC operation. An initial assessment has shown Iridium as a promising metal electrode candidate. Sodium-containing double-oxides, with melting temperatures above AMTEC operating temperatures, including NaNbO3 and Na2Ti3O7, have been identified as possible electrode dopants, to enhance the sodium conductivity of an electrode. Photo-deposition and Evaporative-deposition will be investigated further as electrode fabrication techniques.

The SP‐100 Space Reactor operatesat 1350Kwith lithium metal as the heat transfer medium. The refractory alloys, Niobium‐l%Zirconium (Nb‐l%Zr) and Niobium‐l%Zirconium‐.l%Carbon (PWC‐11) have been selected as the lithium boundary structural material. PWC‐11 is a modified Nb‐l%Zr alloy where 0.1% carbon is added for strengthening. Previously reported creep testing results on PWC‐11 at elevated temperatures indicated that the creep strength was very dependent on the Thermal Mechanical Processing (TMP) of the material. The data was, however, sparse and conflicting concerning which aspects of the TMP were important. A test program was undertaken in conjunction with NASA and DOE National Laboratories to determine the important fabrication processes. The fabrication variables evaluated were extrusion temperature, level of cold work before annealing, in‐process annealing temperature, final annealing temperature and the cooling rate from the final annealing temperature. The test results indicated that of all the va...