Production of high thermal conducting aluminum-graphite composite materials by the press-squeeze method utilizing porous graphite preforms and aluminum alloys

Consideration is given to the technological process of producing high thermal conducting aluminum-graphite composite materials by press-squeeze method utilizing porous graphite preforms and aluminum alloys. It is shown that the rate of press-squeeze process, aluminum alloy composition provide dense, defect-free and non-porous thermal interface between graphite and matrix alloy, it is noted the absence of crystal inclusions of third phases, such as SiC, Al4C3. An example of evaluation of thermal conductivity of the sample of composite material is given with consideration of graphite particles orientation and matrix-filler thermal interface heat conductivity.

Thermal Conducting Properties of Metal-fluoroplastic Material Determined by Tribological Method

The work is devoted to considering the possibility of using the Fourier law and the data of tribological tests for the approximate determination of the thermophysical characteristics of the sheet metal-fluoroplastic material on a steel substrate. The thermal conductivity coefficient of two different fluoroplastic materials was determined by tribological method using the temperature difference in the friction zone. It was shown that friction conditions change from viscoelastic to plastic

Unique Application of K-Y Jelly in Cryotherapy for Giant Cell Tumors of the Distal Femur - A Case Report

GCTs are a locally aggressive tumor that can result in significant pain and dysfunction through the disruption of bony and nearby soft tissue architecture. Although generally benign, these tumors have been shown to have 1-9% chance of metastasis and a local recurrence rate of up to 65%. For these reasons, appropriate treatment is essential to remove primary lesions as well as reduce the odds of metastatic disease and lower recurrence rates. Cryosurgery is a welldescribed technique used to achieve local control of primary GCTs. Modern cryoablation utilizes a cryoprobe to freeze surrounding tissues via release of a thermal conducting gas (argonhelium). The optimal technique for eradication of GCT is a widely debated topic rooted in rates of complications and tumor recurrence. Herein, we describe a case report of a 30-year-old female with a large distal femoral GCT that underwent intralesional curettage and adjunctive cryotherapy utilizing K-Y jelly as a semi-solid medium to transmit the freeze zone more evenly within the cavity. Following cryoablation, the cavity was filled with antibiotic loaded polymethyl methacrylate cement. This technique has scarcely been described in the literature and warrants further investigation.