American Journal of Engineering and Technology Management

Volume 4, Issue 6, December 2019

  • Development of the Composition and Modes of Spraying Antifriction Coating Reinforced with Quasicrystals for the Manufacture of Sliding Bearings

    Silchenko Olga Borisovna, Siluyanova Marina Vladimirovna

    Issue: Volume 4, Issue 6, December 2019
    Pages: 79-82
    Received: 21 March 2019
    Accepted: 26 June 2019
    Published: 27 November 2019
    Abstract: The paper presents the compositions of coatings from composite materials reinforced with quasicrystals. The composition and mode of application of cold gas-dynamic deposition of antifriction coating based on composite materials reinforced with quasicrystals for the manufacture of sliding bearings have been determined and determined. Quasicrystals o... Show More
  • Predictions and Magnetic Characterization of M-type Hexaferrites Doped with Two Cations in the Fe3+ Site

    Pedro Antonio Mariño-Castellanos, Valery Alexevich Lapshinsky, Carlos Pupo, Arles Vega-García, Eduardo Fernández-Cruz, Braddy Ivan Jimenez-Morales

    Issue: Volume 4, Issue 6, December 2019
    Pages: 83-90
    Received: 29 September 2019
    Accepted: 5 November 2019
    Published: 2 December 2019
    Abstract: A theoretical and experimental study of magnetic properties of M-type barium hexaferrites, doped with two cations in the Fe3+ sites: (Co3+, Al3+), (Co2+, Ti4+) and (Co2+, Sn4+) is reported. The theoretical predictions were made using the generalization of a model on the distribution of dopants in the crystallographic sites under study. This approac... Show More
  • Application of Strong Sealing High-performance Water-based Drilling Fluid in the Horizontal Well of the Missan Oilfield

    Lei Zhiyong, Chen Qiang, Guo Tao, Zhang Yong

    Issue: Volume 4, Issue 6, December 2019
    Pages: 91-96
    Received: 8 October 2019
    Accepted: 15 November 2019
    Published: 6 December 2019
    Abstract: In the Missan oilfield, because of its reservoir being "easy leakage in the up and low zones, and wellbore being collapse in the middle zone" with narrow density window, borehole instability, lost circulation, borehole collapse, sticking and other downhole complicated conditions were easily induced. A strong sealing and high performance water-based... Show More
  • Influence of Variation in Moisture Content to Soil Bearing Capacity in Nairobi Area and Its Environs

    Hannah Nyambara Ngugi, Stanley Shitote, Nathaniel Ambassah, Victoria Okumu, John Thuo

    Issue: Volume 4, Issue 6, December 2019
    Pages: 97-109
    Received: 10 October 2019
    Accepted: 12 November 2019
    Published: 18 December 2019
    Abstract: The increasing human population in cities and urban areas continues to raise the demand for housing and other infrastructure in developing nations. Stability of structures is critical for sustainable development to ensure longer useful life of structures and reduction in the rate at which natural resources for construction purposes are extracted fr... Show More