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The importance of glaze layer in the reducation of high temperature sliding friction was introduced, and the research status and development prospect of glaze layer applied on the surface in the field of high temperature sliding friction and wear were discussed. In addition, the microstructure, formation mechanism and influencing factors of glaze layer in high temperature sliding tribology in recent years were analyzed and summarized. Through avoiding the direct contact between metals, the glaze layer could protect the matrix effectively. As the high temperature friction and wear was influenced by many factors (force, heat, material properties, etc.), the formation process of glaze layer was particularly complex, and there was no unified understanding of the formation mechanism of glaze layer. The high - temperature antifriction of glaze layer played an important role in high - temperature sliding tribology. The design of glaze layer and the control of formation conditions were important research directions of high - temperature wear - resistant materials in the future.

Merging and acquisition (M&A) is one of the most important strategies for the development and growth of enterprises. Not only M&A could increase scale, lower cost, expand market shares, but also improves the product diversity and profitability. In order to understand how M&A affects the banks performances among the five countries in East Asia, this study uses the stochastic frontier approach of Battese and Coelli (1995) to compare the different cost efficiencies among the banks of Taiwan, Japan, Hong Kong, Singapore, and South Korea. By simultaneously estimating the cost frontier model and cost inefficiency model, we find that, for most countries, the merging banks increase cost efficiency, while the merged banks decrease cost efficiency. By metafrontier approach of Battese et al. (2004), we find that, in term of both technical gap ratio and metafrontier cost efficiency, Taiwan's banks have the highest performance while Singapore Banks are the worst. Comparing the timing, the worst performance us ually happens on the merging year. However, the metafrontier cost efficiency would be increased one year after merged for all five counties. [ABSTRACT FROM AUTHOR]

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