Metallic compound of ternary Al-B-C system was prepared by mechanical alloying (MA) using Al, boron and graphite powders as starting materials. MA was carried out using Spex 8000 mixer/mill for 50 hours in an argon atmosphere without process control reagent such as methyl alcohol. The MA powders obtained were heat-treated in vacuum at the temperature of 873 and 1273 K for 5 hour. Pure ternary Al-B-C compound was obtained in the chemical content of Al:B:C=55:27:18. The ternary compound obtained in this study has a new phase whose crystal structure is not identified yet.

High-Speed Centrifugal Compaction Process (HCP) is a wet compacting method, in which powders are compacted under a huge centrifugal force. The HCP was well applied to small alumina specimens, but the compact easily cracked when we applied the HCP to other materials. We clarified how the cracks introduced and found that the formation of such a flow pattern was related to the Colioli's force in the centrifugal field.

High-Speed Centrifugal Compaction Process is one of slip-using compacting method originally developed for processing of oxide ceramics. In this study, we apply the HCP to ultra-fine (0.1 micron) WC powder. Organic liquid of heptane was chosen as dispersing media to avoid possible oxidation of WC. The mixing apparatus was a key to obtain dense compacts. Only the slips mixed by high energy planetary ball mill were packed up to 55% by the HCP, and sintered to almost full density at 1673 K without any sintering aids. This sintered compact marked Vickers hardness of Hv 2750 at maximum.

캐나다에서 화본과와 두과목초 및 사료작물은 가축사양에 있어서 주된 에너지 공급원이다 캐나다에 는 약 1,100만 ha의 개량초지와 조사료 생산은 가능하지만 환경조건이 다소 불량한 방대한 면적의 아직 개발되지 않은 3,000만 ha가 넘는 일반초지가 있다. 캐나다는 약 1,240만우의 육우와 약 150만두 의 젖소를 가지고 있다.캐나다 남부지역에서는 짧은 생육기간이 초지농업을 제한한다. 겨울은 길며, 대부분 지역은 저온, 결벙, 해벙 및 질병 등으로 사초