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日本住友石炭矿业公司与机械技术研究所共同协作，研制成功运用放电等离子烧结（SPS）法制造成直径l（k的大块氧化结一不锈钢梯度功能材料．过去利用这种SPS法只能制造直径最大为2～kill的梯度功能材料，用途十分有限，而此次则采用了最大电流为Th人最高压力达四o的大功率放电?
Japan Sumitomo Carbon Mining Corporation and the Institute of Machinery Technology work together to develop the successful use of discharge plasma sintering (SPS) method of manufacturing a diameter l (k bulk oxidation of a stainless steel gradient functional materials in the past using this SPS method can only create the largest diameter For the 2 ~ kill gradient functional materials, the use is very limited, but this time the maximum current Th maximum pressure up to four o high-power discharge?