of atoms slip past each other easily, absorbing energy and allowing dislocations to move, making deformation permanent.
Grain boundaries represent weak spots
Also called Metallic glasses or glassy metals
Cooled faster than atoms can rearrange into a crystal.
Dislocation movement obstructed so absorbs less energy and rebounds elastically to its initial shape.
Resistant to corrosion and
abrasive 마모는 표면이 거칠고 경한 돌기의 작용이나 경한 분말이나 외부로부터 분진
등의 연마작용, abrasive paper 등에 의해 발생하는 마모이다. 주로 재료의 기계적 성질의
영향이 크다 할 수 있다. 이것은 전술한대로 요철설에 의한 마모의 확장으로 간주할 수
있다.
그림 18. abrasive 마모의 모식
Ⅰ. Introduction
1) Location
Russia is located in the north Eurasia continent (Far East Asia ~ Europe). Russia is the largest country in the world which is about 1/8 of the world’s land area. Because of this huge territory, there is an 11-hour time difference between East and West.
2) Climate
The huge territory of Russia also makes a various climate zone. Basically, Russia has continental
(1) Project Objective
To develop a new commercial product that is valuable, feasible, and practical in the real market.
(2) Deciding The Market for The New Product
In this world, there are myriad markets, consumers, products. However, considering our company's technologies(internal factor) and marketability(external factor), we chose the market of kitchen utensils for our new product.
Partial substitution of Ba by a smaller M2+ ion
unit cell volume decreases and the phase transition temperature decreases
An insulator at room temperature becomes semiconductive after doping
trivalent donars (e.g. La, Sb, Y) substitute for the Ba2+
pentavalent donars (e.g. Sb, Nb, Ta) substitute for Ti4+.
와인 보관 창고
적정온도 : 7-13도
더 낮은